Difference between revisions of "API:EPrints/DataObj"

Latest revision as of 16:41, 10 January 2022

EPrints 3 Reference: Directory Structure - Metadata Fields - Repository Configuration - XML Config Files - XML Export Format - EPrints data structure - Core API - Data Objects

API: Core API

Latest Source Code (3.4, 3.3) | Revision Log | Before editing this page please read Pod2Wiki

NAME

EPrints::DataObj - Base class for records in EPrints.

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DESCRIPTION

This is a base class that is inherited by EPrints::DataObj::EPrint, EPrints::DataObj::User, EPrints::DataObj::Subject and EPrints::DataObj::Document and various other classes representing data objects.

This class is abstract and its methods should not be called directly.

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Synopsis

$dataobj = $dataset->dataobj( $id );
$dataobj->delete;
$dataobj->commit( $force );
$dataset = $dataobj->dataset;
$repo = $dataobj->repository;
$id = $dataobj->id;
$dataobj->set_value( $fieldname, $value );
$value = $dataobj->value( $fieldname );
\@value = $dataobj->value( $fieldname ); # multiple
$boolean = $dataobj->is_set( $fieldname );
$xhtml = $dataobj->render_value( $fieldname );
$xhtml = $dataobj->render_citation( $style, %opts );
$uri = $dataobj->uri;
$string = $dataobj->export( $plugin_id, %opts );
$dataobj = $dataobj->create_subobject( $fieldname, $epdata );

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CORE METADATA FIELDS

None. This is an abstract class from which real data objects inherit and then add their metadata fields.

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REFERENCES AND RELATED OBJECTS

None. This is an abstract class from which real data objects inherit and then add their references and related objects.

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INSTANCE VARIABLES

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$self->{changed}

A reference to a hash containing the old values of metadata that has changed since his the data object was last committed.

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$self->{data}

A reference to a hash containing the metadata of this record.

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$self->{dataset}

The EPrints::DataSet to which this record belongs.

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$self->{non_volatile_change}

A boolean signifying whether the current changes include at least one change to a non-volatile field.

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$self->{session}

The current EPrints::Repository. This use to be EPrints::Session but was replaced in later versions. See EPrints::BackCompatibility.

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$self->{under_construction}

A boolean signifying if the data object is currently under construction and therefore know house-keeping should be carried out on the data object whilst set.

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METHODS

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Constructor Methods

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new

$dataobj = EPrints::DataObj->new( $session, $id, [ $dataset ] )

Return new data object, created by loading it from the database.

If $dataset is not defined uses the default dataset for this object.

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new_from_data

$dataobj = EPrints::DataObj->new_from_data( $session, $data, [ $dataset ] )

Construct and and returns a new data object based on the $data hash reference of metadata.

This is usually called by create_from_data to ensure default values are set for those field values not initially included in $data before this method constructs the data object.

$dataset is determined from the class if not provided.

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create

$dataobj = EPrints::DataObj::create( $session, @default_data )

ABSTRACT

Create a new object of this type in the database.

The syntax for @default_data depends on the type of data object.

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create_from_data

$dataobj = EPrints::DataObj->create_from_data( $session, $data, [ $dataset ] )

Creates and returns a new data object of this type in the database.

$data is a structured hash reference with multiple dimensions to encompass compound, multiple and sub-object field values.

$dataset is the dataset to which the new data object will belong. If this is not defined, it is determined from the class.

This will pull in defaults for unset field values in $data before calling new_from_data. It will also create any sub-objects as well as the main object.

Call this via:

$dataset->create_object( $session, $data )

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Class Methods

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get_system_field_info

$sys_fields = EPrints::DataObj->get_system_field_info

Return an array describing the system metadata of the this dataset.

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get_defaults

$defaults = EPrints::DataObj->get_defaults( $session, $data, [ $dataset ] )

Return default values for this object based on the starting $data. Uses the data object class to determine dataset if $dataset not set.

Should be subclassed.

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get_dataset_id

$dataset = EPrints::DataObj->get_dataset_id

Returns the ID of the EPrints::DataSet object to which this record belongs.

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xml_to_epdata

$epdata = EPrints::DataObj->xml_to_epdata( $session, $xml, %opts )

Populates $epdata based on $xml using options in %opts. This is the inverse of to_xml but doesn't create a new object.

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export_fieldlist

EPrints::DataObj->export_fieldlist

Returns fields to be exported by plugins that do not have pre-defined fields to export, (e.g. Export::XML).

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in_export_fieldlist

EPrints::DataObj->in_export_fieldlist

Returns whether a field is in the export fieldlist for a particular data object. Returns true if there is no fieldlist restriction.

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start_element

EPrints::DataObj->start_element( $data, $epdata, $state )

Consumes a SAX event.

$data is the SAX node data.

$epdata is an EPrints data structure to write values to.

$state maintains state between SAX calls but must contain at least:

   dataset - the dataset the class belongs to

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end_element

EPrints::DataObj->end_element( $data, $epdata, $state )

Ends element from start_element.

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characters

EPrints::DataObj->characters( $data, $epdata, $state )

Consumes characters within start_element.

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Object Methods

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clone

$clone = $dataobj->clone

Clone the current data object, by creating a new data object of the same type and metadata but a new ID.

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create_subdataobj

$subdataobj = $dataobj->create_subdataobj( $fieldname, $epdata )

Creates and returns a new data object that is a sub-object of this object in field $fieldname with initial data $epdata.

Clears the sub-object cache for this $fieldname which is equivalent to:

$dataobj->set_value( $fieldname, undef );

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local_path

$local_path = $dataobj->local_path

Return local_path string for the history of the data object.

Should be subclassed.

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update_triggers

$dataobj->update_triggers

Update all the stuff that needs to be updated before the data object is written to the database.

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delete

$success = $dataobj->delete

Delete this data object from the database and any sub-objects or related files.

Alias for:

$dataobj->remove

Return true if successful.

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empty

$dataobj->empty

Remove all of this object's values that may be imported.

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update

$dataobj->update( $epdata [, %opts ] )

Update this object's values from $epdata. Ignores any values that do not exist in the dataset or do not have the 'import' property set.

 include_subdataobjs - replace sub-dataobjs if given
 
 # replaces all documents in $dataobj
 $dataobj->update( {
   title => "Wombats on Fire",
   documents => [{
     main => "wombat.pdf",
     ...
   }],
 }, include_subdataobjs => 1 );

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set_under_construction

$dataobj->set_under_construction( $boolean )

Set a flag to indicate this object is being constructed and any house keeping will be handled by the method constructing it so don't do it elsewhere.

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under_construction

$boolean = $dataobj->under_construction

Returns c<true> if this object is part way through being constructed.

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clear_changed

$dataobj->clear_changed

Clear any changed fields, which will result in them not being committed unless force is used.

This method is used by the EPrints::Database to avoid unnecessary commits.

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clear_citationcaches

$dataobj->clear_citationcaches

Clear any EPrints::DataObj::CitationCache objects associated with the data object.

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commit

$success = $dataobj->commit( [ $force ] )

Write this object to the database and reset the changed fields.

If $force isn't true then it only actually modifies the database if one or more fields have been changed.

Commit may also queue indexer jobs or log changes, depending on the object.

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value

$value = $dataobj->value( $fieldname )

Get a the value of a metadata field with $fieldname. If the field is not set then it returns undef unless the field has the property multiple set, in which case it returns [] (a reference to an empty a rray).

Alias for:

$dataobj->get_value( $fieldname )

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set_value

$dataobj->set_value( $fieldname, $value )

Set the $value of the named metadata field $fieldname for this data object.

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set_value_raw

$dataobj->set_value_raw( $fieldname, $value )

Set the $value of the named metadata field $fieldname for this data object by directly modifying its data hash reference. Use with care!

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get_values

@values = $dataobj->get_values( $fieldnames )

Returns a list of all the values in this record of all the $fields specified by $fieldnames. These should be in the format used by browse views, using / to seperate individual field names with an optional .id suffix to indicate the ID part rather than the main part.

E.g. author.id/editor.id would return a list of all author and editor IDs from this record.

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repository

$session = $dataobj->repository

Returns the EPrints::Repository object to which this record belongs.

Alias for:

$dataobj->get_session

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get_data

$data = $dataobj->get_data

Returns a reference to the hash of all the metadata for this record keyed by fieldname.

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get_dataset

$dataset = $dataobj->get_dataset

Returns the EPrints::DataSet object to which this record belongs.

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is_set

$boolean = $dataobj->is_set( $fieldname )

Returns true if the field with $fieldname is set in this record, otherwise false.

Warns if the field with $fieldname does not exist.

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exists_and_set

$boolean = $dataobj->exists_and_set( $fieldname )

Returns true if the field with $fieldname is set in this record, otherwise false.

If the field does not exist, just return false.

This method is useful for plugins which may operate on multiple repositories, when field not existing is not an issue for a particular repository.

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id

$id = $dataobj->id

Returns the value of the primary key of this record.

Alias for:

$dataobj->get_id

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get_gid

$gid = $dataobj->get_gid

DEPRECATED (see uri)

Returns the globally referential fully-qualified identifier for this data object or undef if this object can not be externally referenced.

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get_datestamp

$datestamp = $dataobj->get_datestamp

Returns the datestamp of this object in "YYYY-MM-DD hh:mm:ss" format.

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render_value

$xhtml = $dataobj->render_value( $fieldname, [ $showall ] )

Returns the rendered version of the value of the given $fieldname as appropriate for the current session. If $showall is true then all values are rendered - this is usually used for staff viewing data.

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render_citation

$xhtml = $dataobj->render_citation( [ $style, %params ] )

Renders the record as a citation. If $style is set then it uses that citation style from the citations config file. Otherwise $style defaults to the type of this record. If $params{url} is set then the citation will link to the specified URL.

If $style is unset then use default.

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render_citation_link

$xhtml = $dataobj->render_citation_link( [ $style, %params ] )

Renders a citation as like render_citation but as a link to the URL for this item. E.g. the abstract page of an eprint.

$params{url} is set to data object's URL if not set.

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render_citation_link

$xhtml = $dataobj->render_citation_link( [ $style, %params ] )

Renders a citation as like render_citation but as a link to the control URL for this item. E.g. for items that are not yet in the live archive.

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render_description

$xhtml = $dataobj->render_description

Returns a short description of this object using the brief citation style for this dataset or the default citation style of the former does not exist.

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render

( $xhtml, $title ) = $dataobj->render

Return a chunk of XHTML DOM describing this object in the normal way. This is the public view of the record, not the staff view.

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render_full

$xhtml = $dataobj->render_full

Return an XHTML table in DOM describing this record. All values of all fields are listed. This is the staff view.

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render_export_links

$xhtml_ul_list = $dataobj->render_export_links( [ $staff ] )

Return a <ul> list containing links to all the formats this eprint is available in.

If $staff is true then show all formats available to staff and link to the staff export URL.

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render_export_bar

$xhtml = $dataobj->render_export_bar( [ $staff ] )

Returns a rendered drop-down list of exports.

If $staff is true then include both public and staff visible export options.

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uri

$url = $dataobj->uri

Returns a unique URI for this object. Not certain to resolve as a URL.

If $c-{dataobj_uri}->{eprint}> is a function, call that to work it out.

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internal_uri

$uri = $dataobj->internal_uri

Return an internal URI for this object (independent of repository hostname).

To retrieve an object by internal URI use EPrints::DataSet::get_object_from_uri().

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path

$path = $dataobj->path

Returns the relative path to this object from the repository's base URL, if the object has a URL.

Does not include any leading slash.

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url

$url = $dataobj->url

Returns the URL for this record, e.g.the URL of the abstract page of an eprint.

Alias for:

$dataobj->get_url

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get_control_url

$url = $dataobj->get_control_url

Returns the URL for the control page for this object.

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get_type

$type = $dataobj->get_type

ABSTRACT.

Returns the type of this data object. This not the dataset it belongs to but the specific type within the dataset (e.g. c<user> could be editor, admin, etc.).

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to_xml

$xmlfragment = $dataobj->to_xml( %opts )

Convert this object into an XML fragment using options %opts.

Options:

no_xmlns - Do not include a xmlns attribute in the outer element. 
(This assumes this chunk appears in a larger tree where the xmlns is 
already set correctly.
showempty - Fields with no value are shown.
embed - Include the data of a file, not just it's URL.

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to_sax

$dataobj->to_sax( %opts )

Stream this object to a SAX handler using the options in $opts.

Options:

Handler - the SAX handler to build the output.
revision_generation - Generate XML for revision files rather than 
export.

This does not output any document-level events.

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export

$plugin_output = $dataobj->export( $plugin_id, %params )

Apply an export plugin with $plugin_id to this data object, using the parameters provided by %params and supplying them to the output_dataobj method of the EPrints::Plugin:Export plugin.

Return the output of the export plugin.

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queue_changes

$dataobj->queue_changes

Add all the changed fields into the indexers todo queue.

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queue_all

$dataobj->queue_all

Add all the fields into the indexers todo queue.

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queue_fulltext

$dataobj->queue_fulltext

Add a fulltext index into the indexers todo queue.

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queue_removed

$dataobj->queue_removed

Add an index removed event to the indexer's queue.

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has_owner

$boolean = $dataobj->has_owner( $user )

Return true if $user owns this record. Normally this means they created it, but a group of users could count as owners of the same record if you wanted.

It's false on most data objects, except those which override this method.

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permit

$rc = $dataobj->permit( $priv, [ $user ] )
 # current user can edit via editorial role
 if( $dataobj->permit( "xxx/edit", $user ) & 8 )
 {
   ...
 }
 # anyone can view this object
 if( $dataobj->permit( "xxx/view" ) )
 {
 }

Returns true if the specified $user (or 'anybody') can perform this action.

Returns a bit mask where:

 0 - not permitted
 1 - anybody
 2 - logged in user
 4 - user as owner
 8 - user as editor

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in_editorial_scope_of

$boolean = $dataobj->in_editorial_scope_of( $user )

As for has_owner, but if the $user is identified as someone with an editorial scope which includes this record.

Defaults to true. Which doesn't mean that they have the right to edit it, just that their scope matches. You also need editor rights to use this. It's currently used just to filter eprint editors so that only ones with appropriate scope and privilege can edit.

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validate

$problems = $dataobj->validate( $for_archive )

Validate this data object. Not used on all sub-classed. $for_archive being true indicates that the item is beting validated to go live.

Returns a reference to an array of XHTML DOM objects describing validation problems with the entire data object for the supplied $for_archive archive ID.

A reference to an empty array indicates no problems.

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get_warnings

$warnings = $dataobj->get_warnings

Returns a reference to an array of XHTML DOM objects describing problems with the entire data object.

A reference to an empty array indicates no problems.

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validate_field

@problems = $dataobj->validate_field( $fieldname )

Check if a field named $fieldname is valid.

Returns a reference to an array of XHTML problems.

A reference to an empty array indicates no problems.

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tidy

$dataobj->tidy

Cleans up any multiple fields with gaps.

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add_stored_file

$file = $dataobj->add_stored_file( $filename, $filehandle, $filesize )

Convenience method to add (or replace) the file record for $filename to this object. Reads $filesize bytes from $filehandle.

Returns the file object or undef if the storage failed.

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stored_file

$file = $dataobj->stored_file( $filename )

Get the file object for $filename.

Returns the file object or undef if the file doesn't exist.

Has alias:

$dataobj->get_stored_file( $filename )

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add_dataobj_relations

$dataobj->add_dataobj_relations( $target, %relations )

Add a relation from this data object to the $target data object using predicates defined in the keys of the %relations hash. If values are defined in the hash reciprocal relationships from the $target data object to this data object are also.

You must commit $target data object after calling this method.

Has alias:

$dataobj->add_object_relations( $target, %relations )

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has_dataobj_relations

$boolean = $dataobj->has_dataobj_relations( $target, @required )

Returns true if this object is related to $target by all @required.

If @required is empty will return true if any relationships exist.

Has alias:

$dataobj->has_object_relations( $target, @required )

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has_related_dataobjs

$boolean = $dataobj->has_related_dataobjs( @required )

Returns true if related_dataobjs would return some objects but without actually retrieving the related objects from the database.

Has alias:

$dataobj->has_related_objects( @required )

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related_dataobjs

@dataobjs = $dataobj->related_dataobjs( @required )

Returns a list of objects related to this data object by a relation in @required.

Has alias:

$dataobj->get_related_objects( @required )

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remove_dataobj_relations

$dataobj->remove_dataobj_relations( $target, %relations )

Remove relations between this data object and the $target data object. If %relations is not empty only remove those relationships which are keys in this hash.

You must commit this object and $target to write the changes.

Has alias:

$dataobj->remove_object_relations( $target, %relations )

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COPYRIGHT

EPrints 3.4 is supplied by EPrints Services.

http://www.eprints.org/eprints-3.4/

LICENSE

This file is part of EPrints 3.4 http://www.eprints.org/.

EPrints 3.4 and this file are released under the terms of the GNU Lesser General Public License version 3 as published by the Free Software Foundation unless otherwise stated.

EPrints 3.4 is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along with EPrints 3.4. If not, see http://www.gnu.org/licenses/.

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@@ Line 1: / Line 1: @@
 <!-- Pod2Wiki=_preamble_
-This page has been automatically generated from the EPrints 3.2 source. Any wiki changes made between the 'Pod2Wiki=*' and 'Edit below this comment' comments will be lost.
+This page has been automatically generated from the EPrints 3.4 source. Any wiki changes made between the 'Pod2Wiki=*' and 'Edit below this comment' comments will be lost.
-  -->
+  -->{{API}}{{Pod2Wiki}}{{API:Source|file=EPrints/DataObj.pm|package_name=EPrints::DataObj}}[[Category:API|DATAOBJ]][[Category:API:EPrints/DataObj|DATAOBJ]]<div><!-- Edit below this comment -->
-__NOTOC__
-{{API}}{{Pod2Wiki}}{{API:Source|file=EPrints/DataObj.pm|package_name=EPrints::DataObj}}[[Category:API|DataObj]]<div><!-- Edit below this comment -->
-<!-- Pod2Wiki=head_name --></div>
+<!-- Pod2Wiki=_private_ --><!-- Pod2Wiki=head_name -->
 ==NAME==
 '''EPrints::DataObj''' - Base class for records in EPrints.
 <div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
-<h4><span style='display:none'>User Comments</span></h4>
+<span style='display:none'>User Comments</span>
 <!-- Edit below this comment -->
-<!-- Pod2Wiki=head_synopsis --></div>
+<!-- Pod2Wiki= -->
-==SYNOPSIS==
+</div>
-  $dataobj = EPrints::DataObj-&gt;new( $handle, $id [, $dataset] );
+<!-- Pod2Wiki=head_description -->
-  $dataobj = $dataset-&gt;get_object( $id );
+==DESCRIPTION==
-  $dataobj = $handle-&gt;get_XXXXX( $id );
+This is a base class that is inherited by [[API:EPrints/DataObj/EPrint|EPrints::DataObj::EPrint]], [[API:EPrints/DataObj/User|EPrints::DataObj::User]], [[API:EPrints/DataObj/Subject|EPrints::DataObj::Subject]] and [[API:EPrints/DataObj/Document|EPrints::DataObj::Document]] and various other classes representing data objects.
+This class is abstract and its methods should not be called directly.
+<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
+<span style='display:none'>User Comments</span>
+<!-- Edit below this comment -->
+<!-- Pod2Wiki= -->
+</div>
+<!-- Pod2Wiki=head_synopsis -->
+===Synopsis===
+ $dataobj = $dataset-&gt;dataobj( $id );
+ $dataobj-&gt;delete;
+ $dataobj-&gt;commit( $force );
+ $dataset = $dataobj-&gt;dataset;
+ $repo = $dataobj-&gt;repository;
+ $id = $dataobj-&gt;id;
+ $dataobj-&gt;set_value( $fieldname, $value );
+ $value = $dataobj-&gt;value( $fieldname );
+ \@value = $dataobj-&gt;value( $fieldname ); # multiple
+ $boolean = $dataobj-&gt;is_set( $fieldname );
+ $xhtml = $dataobj-&gt;render_value( $fieldname );
+ $xhtml = $dataobj-&gt;render_citation( $style, %opts );
+ $uri = $dataobj-&gt;uri;
+ $string = $dataobj-&gt;export( $plugin_id, %opts );
+ $dataobj = $dataobj-&gt;create_subobject( $fieldname, $epdata );
-  $handle = $dataobj-&gt;get_handle;
+<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
-  $dataset = $dataobj-&gt;get_dataset;
+<span style='display:none'>User Comments</span>
+<!-- Edit below this comment -->
+<!-- Pod2Wiki= -->
+</div>
+<!-- Pod2Wiki=head_core_metadata_fields -->
+==CORE METADATA FIELDS==
+None. This is an abstract class from which real data objects  inherit and then add their metadata fields.
+<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
+<span style='display:none'>User Comments</span>
+<!-- Edit below this comment -->
+<!-- Pod2Wiki= -->
+</div>
+<!-- Pod2Wiki=head_references_and_related_objects -->
+==REFERENCES AND RELATED OBJECTS==
+None. This is an abstract class from which real data objects inherit and then add their references and related objects.
+<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
+<span style='display:none'>User Comments</span>
+<!-- Edit below this comment -->
+<!-- Pod2Wiki= -->
+</div>
+<!-- Pod2Wiki=head_instance_variables -->
+==INSTANCE VARIABLES==
+<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
+<span style='display:none'>User Comments</span>
+<!-- Edit below this comment -->
+<!-- Pod2Wiki= -->
+</div>
+<!-- Pod2Wiki=item_$self->{changed} -->
+===$self-&gt;{changed}===
+A reference to a hash containing the old values of metadata that has changed since his the data object was last committed.
+<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
+<span style='display:none'>User Comments</span>
+<!-- Edit below this comment -->
+<!-- Pod2Wiki= -->
+</div>
+<!-- Pod2Wiki=item_$self->{data} -->
+===$self-&gt;{data}===
+A reference to a hash containing the metadata of this record.
+<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
+<span style='display:none'>User Comments</span>
+<!-- Edit below this comment -->
+<!-- Pod2Wiki= -->
+</div>
+<!-- Pod2Wiki=item_$self->{dataset} -->
+===$self-&gt;{dataset}===
+The [[API:EPrints/DataSet|EPrints::DataSet]] to which this record belongs.
+<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
+<span style='display:none'>User Comments</span>
+<!-- Edit below this comment -->
+<!-- Pod2Wiki= -->
+</div>
+<!-- Pod2Wiki=item_$self->{non_volatile_change} -->
+===$self-&gt;{non_volatile_change}===
+A boolean signifying whether the current changes include at least one change to a non-volatile field.
+<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
+<span style='display:none'>User Comments</span>
+<!-- Edit below this comment -->
+<!-- Pod2Wiki= -->
+</div>
+<!-- Pod2Wiki=item_$self->{session} -->
+===$self-&gt;{session}===
+The current [[API:EPrints/Repository|EPrints::Repository]]. This use to be [[API:EPrints/Session|EPrints::Session]] but was replaced in later versions. See [[API:EPrints/BackCompatibility|EPrints::BackCompatibility]].
+<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
+<span style='display:none'>User Comments</span>
+<!-- Edit below this comment -->
+<!-- Pod2Wiki= -->
+</div>
+<!-- Pod2Wiki=item_$self->{under_construction} -->
+===$self-&gt;{under_construction}===
+A boolean signifying if the data object is currently under construction and therefore know house-keeping should be carried out on the data object whilst set.
+<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
+<span style='display:none'>User Comments</span>
+<!-- Edit below this comment -->
+<!-- Pod2Wiki= -->
+</div>
+<!-- Pod2Wiki=head_methods -->
+==METHODS==
+<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
+<span style='display:none'>User Comments</span>
+<!-- Edit below this comment -->
+<!-- Pod2Wiki= -->
+</div>
+<!-- Pod2Wiki=head_constructor_methods -->
+===Constructor Methods===
+<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
+<span style='display:none'>User Comments</span>
+<!-- Edit below this comment -->
+<!-- Pod2Wiki= -->
+</div>
+<!-- Pod2Wiki=item_new -->
+====new====
+ $dataobj = EPrints::DataObj-&gt;new( $session, $id, [ $dataset ] )
+Return new data object, created by loading it from the database.
+If <tt>$dataset</tt> is not defined uses the default dataset for this object.
+<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
+<span style='display:none'>User Comments</span>
+<!-- Edit below this comment -->
+<!-- Pod2Wiki= -->
+</div>
+<!-- Pod2Wiki=item_new_from_data -->
+====new_from_data====
+ $dataobj = EPrints::DataObj-&gt;new_from_data( $session, $data, [ $dataset ] )
+Construct and and returns a new data object based on the <tt>$data</tt> hash reference of metadata.
+This is usually called by [[API:EPrints/DataObj#create_from_data|create_from_data]] to ensure default values are set for those field values not initially included in <tt>$data</tt> before this method constructs the data object.
+<tt>$dataset</tt> is determined from the class if not provided.
+<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
+<span style='display:none'>User Comments</span>
+<!-- Edit below this comment -->
+<!-- Pod2Wiki= -->
+</div>
+<!-- Pod2Wiki=item_create -->
+====create====
+ $dataobj = EPrints::DataObj::create( $session, @default_data )
+ABSTRACT
+Create a new object of this type in the database.
+The syntax for <tt>@default_data</tt> depends on the type of data object.
+<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
+<span style='display:none'>User Comments</span>
+<!-- Edit below this comment -->
+<!-- Pod2Wiki= -->
+</div>
+<!-- Pod2Wiki=item_create_from_data -->
+====create_from_data====
+ $dataobj = EPrints::DataObj-&gt;create_from_data( $session, $data, [ $dataset ] )
+Creates and returns a new data object of this type in the database.
+<tt>$data</tt> is a structured hash reference with multiple dimensions to encompass compound, multiple and sub-object field values.
+<tt>$dataset</tt> is the dataset to which the new data object will belong. If this is not defined, it is determined from the class.
+This will pull in defaults for unset field values in <tt>$data</tt> before calling [[API:EPrints/DataObj#new_from_data|new_from_data]]. It will also create any sub-objects as well as the main object.
+Call this via:
+ $dataset-&gt;create_object( $session, $data )
-  $id = $dataobj-&gt;get_id;
+<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
-  $uri = $dataobj-&gt;uri;
+<span style='display:none'>User Comments</span>
-  $url = $dataobj-&gt;get_url;
+<!-- Edit below this comment -->
-  $url = $dataobj-&gt;get_control_url;
+<!-- Pod2Wiki= -->
+</div>
+<!-- Pod2Wiki=head_class_methods -->
+===Class Methods===
+<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
+<span style='display:none'>User Comments</span>
+<!-- Edit below this comment -->
+<!-- Pod2Wiki= -->
+</div>
+<!-- Pod2Wiki=item_get_system_field_info -->
+====get_system_field_info====
+ $sys_fields = EPrints::DataObj-&gt;get_system_field_info
+Return an array describing the system metadata of the this  dataset.
+<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
+<span style='display:none'>User Comments</span>
+<!-- Edit below this comment -->
+<!-- Pod2Wiki= -->
+</div>
+<!-- Pod2Wiki=item_get_defaults -->
+====get_defaults====
+ $defaults = EPrints::DataObj-&gt;get_defaults( $session, $data, [ $dataset ] )
+Return default values for this object based on the starting <tt>$data</tt>. Uses the data object class to determine dataset if <tt>$dataset</tt> not set.
+Should be subclassed.
+<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
+<span style='display:none'>User Comments</span>
+<!-- Edit below this comment -->
+<!-- Pod2Wiki= -->
+</div>
+<!-- Pod2Wiki=item_get_dataset_id -->
+====get_dataset_id====
+ $dataset = EPrints::DataObj-&gt;get_dataset_id
+Returns the ID of the [[API:EPrints/DataSet|EPrints::DataSet]] object to which this record belongs.
+<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
+<span style='display:none'>User Comments</span>
+<!-- Edit below this comment -->
+<!-- Pod2Wiki= -->
+</div>
+<!-- Pod2Wiki=item_xml_to_epdata -->
+====xml_to_epdata====
+ $epdata = EPrints::DataObj-&gt;xml_to_epdata( $session, $xml, %opts )
+Populates <tt>$epdata</tt> based on <tt>$xml</tt> using options in <tt>%opts</tt>. This is the inverse of [[API:EPrints/DataObj#to_xml|to_xml]] but doesn't create a new object.
+<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
+<span style='display:none'>User Comments</span>
+<!-- Edit below this comment -->
+<!-- Pod2Wiki= -->
+</div>
+<!-- Pod2Wiki=item_export_fieldlist -->
+====export_fieldlist====
+ EPrints::DataObj-&gt;export_fieldlist
+Returns fields to be exported by plugins that do not have pre-defined fields to export, (e.g. {{API:PodLink|file=Export/XML|package_name=Export::XML|section=|text=Export::XML}}).
+<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
+<span style='display:none'>User Comments</span>
+<!-- Edit below this comment -->
+<!-- Pod2Wiki= -->
+</div>
+<!-- Pod2Wiki=item_in_export_fieldlist -->
+====in_export_fieldlist====
+ EPrints::DataObj-&gt;in_export_fieldlist
+Returns whether a field is in the export fieldlist for a particular data object.  Returns <tt>true</tt> if there is no fieldlist restriction.
+<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
+<span style='display:none'>User Comments</span>
+<!-- Edit below this comment -->
+<!-- Pod2Wiki= -->
+</div>
+<!-- Pod2Wiki=item_start_element -->
+====start_element====
+ EPrints::DataObj-&gt;start_element( $data, $epdata, $state )
+Consumes a SAX event.
+<tt>$data</tt> is the SAX node data.
+<tt>$epdata</tt> is an EPrints data structure to write values to.
+<tt>$state</tt> maintains state between SAX calls but must contain at least:
+    dataset - the dataset the class belongs to
-  $value = $dataobj-&gt;get_value( $fieldname );
+<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
-  $bool = $dataobj-&gt;is_set( $fieldname );
+<span style='display:none'>User Comments</span>
-  $bool = $dataobj-&gt;exists_and_set( $fieldname );
+<!-- Edit below this comment -->
+<!-- Pod2Wiki= -->
+</div>
+<!-- Pod2Wiki=item_end_element -->
+====end_element====
+ EPrints::DataObj-&gt;end_element( $data, $epdata, $state )
+Ends element from [[API:EPrints/DataObj#start_element|start_element]].
+<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
+<span style='display:none'>User Comments</span>
+<!-- Edit below this comment -->
+<!-- Pod2Wiki= -->
+</div>
+<!-- Pod2Wiki=item_characters -->
+====characters====
+ EPrints::DataObj-&gt;characters( $data, $epdata, $state )
+Consumes characters within [[API:EPrints/DataObj#start_element|start_element]].
+<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
+<span style='display:none'>User Comments</span>
+<!-- Edit below this comment -->
+<!-- Pod2Wiki= -->
+</div>
+<!-- Pod2Wiki=head_object_methods -->
+===Object Methods===
+<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
+<span style='display:none'>User Comments</span>
+<!-- Edit below this comment -->
+<!-- Pod2Wiki= -->
+</div>
+<!-- Pod2Wiki=item_clone -->
+====clone====
+ $clone = $dataobj-&gt;clone
+Clone the current data object, by creating a new data object of the same type and metadata but a new ID.
+<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
+<span style='display:none'>User Comments</span>
+<!-- Edit below this comment -->
+<!-- Pod2Wiki= -->
+</div>
+<!-- Pod2Wiki=item_create_subdataobj -->
+====create_subdataobj====
+ $subdataobj = $dataobj-&gt;create_subdataobj( $fieldname, $epdata )
+Creates and returns a new data object that is a sub-object of this  object in field <tt>$fieldname</tt> with initial data <tt>$epdata</tt>.
+Clears the sub-object cache for this <tt>$fieldname</tt> which is equivalent  to:
+ $dataobj-&gt;set_value( $fieldname, undef );
-  $success = $dataobj-&gt;remove;
+<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
+<span style='display:none'>User Comments</span>
+<!-- Edit below this comment -->
+<!-- Pod2Wiki= -->
+</div>
+<!-- Pod2Wiki=item_local_path -->
+====local_path====
+ $local_path = $dataobj-&gt;local_path
+Return local_path string for the history of the data object.
+Should be subclassed.
+<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
+<span style='display:none'>User Comments</span>
+<!-- Edit below this comment -->
+<!-- Pod2Wiki= -->
+</div>
+<!-- Pod2Wiki=item_update_triggers -->
+====update_triggers====
+ $dataobj-&gt;update_triggers
+Update all the stuff that needs to be updated before the data object  is written to the database.
+<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
+<span style='display:none'>User Comments</span>
+<!-- Edit below this comment -->
+<!-- Pod2Wiki= -->
+</div>
+<!-- Pod2Wiki=item_delete -->
+====delete====
+ $success = $dataobj-&gt;delete
+Delete this data object from the database and any sub-objects or  related files.
+Alias for:
+ $dataobj-&gt;remove
-  $dataobj-&gt;set_value( $fieldname, $value );
+Return <tt>true</tt> if successful.
-  $success = $dataobj-&gt;commit( [$force] );
+<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
+<span style='display:none'>User Comments</span>
+<!-- Edit below this comment -->
+<!-- Pod2Wiki= -->
+</div>
+<!-- Pod2Wiki=item_empty -->
+====empty====
+ $dataobj-&gt;empty
+Remove all of this object's values that may be imported.
+<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
+<span style='display:none'>User Comments</span>
+<!-- Edit below this comment -->
+<!-- Pod2Wiki= -->
+</div>
+<!-- Pod2Wiki=item_update -->
+====update====
+ $dataobj-&gt;update( $epdata [, %opts ] )
+Update this object's values from $epdata. Ignores any values that do not exist in the dataset or do not have the 'import' property set.
+  include_subdataobjs - replace sub-dataobjs if given
-   $xhtml = $dataobj-&gt;render_value( $fieldname, [$showall] );
+   # replaces all documents in $dataobj
-   $xhtml = $dataobj-&gt;render_citation( [$style], [%params] );
+   $dataobj-&gt;update( {
-  $xhtml = $dataobj-&gt;render_citation_link( [$style], %params );
+    title =&gt; "Wombats on Fire",
-  $xhtml = $dataobj-&gt;render_citation_link_staff( [$style], %params );
+    documents =&gt; [{
-  $xhtml = $dataobj-&gt;render_description;
+      main =&gt; "wombat.pdf",
-  ($xhtml, $title ) = $dataobj-&gt;render;
+      ...
-   ($xhtml, $title ) = $dataobj-&gt;render_full;
+    }],
+   }, include_subdataobjs =&gt; 1 );
-  $plugin_output = $dataobj-&gt;export( $plugin_id [,%params] );
 <div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
-<h4><span style='display:none'>User Comments</span></h4>
+<span style='display:none'>User Comments</span>
+<!-- Edit below this comment -->
+<!-- Pod2Wiki= -->
+</div>
+<!-- Pod2Wiki=item_set_under_construction -->
+====set_under_construction====
+ $dataobj-&gt;set_under_construction( $boolean )
+Set a flag to indicate this object is being constructed and any house  keeping will be handled by the method constructing it so don't do it  elsewhere.
+<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
+<span style='display:none'>User Comments</span>
 <!-- Edit below this comment -->
-<!-- Pod2Wiki=head_description --></div>
+<!-- Pod2Wiki= -->
-==DESCRIPTION==
+</div>
-This module is a base class which is inherited by [[API:EPrints/DataObj/EPrint|EPrints::DataObj::EPrint]], [[API:EPrints/User|EPrints::User]], [[API:EPrints/DataObj/Subject|EPrints::DataObj::Subject]] and [[API:EPrints/DataObj/Document|EPrints::DataObj::Document]] and several other classes.
+<!-- Pod2Wiki=item_under_construction -->
+====under_construction====
-It is ABSTRACT - these methods should not be called directly.
+ $boolean = $dataobj-&gt;under_construction
+Returns c&lt;true&gt; if this object is part way through being constructed.
-To create a new object in the database use:
+<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
-	$obj = $ds-&gt;create_object( $handle, $data ); =cut
+<span style='display:none'>User Comments</span>
+<!-- Edit below this comment -->
-###################################################################### #
-# INSTANCE VARIABLES: #
-#  $self-&gt;{data} #     A reference to a hash containing the metadata of this #     record. #
-#  $self-&gt;{handle} #     The current EPrints::Handle #
-#  $self-&gt;{dataset} #     The EPrints::DataSet to which this record belongs. #
-######################################################################
-package EPrints::DataObj;
+<!-- Pod2Wiki= -->
+</div>
+<!-- Pod2Wiki=item_clear_changed -->
+====clear_changed====
-use MIME::Base64 ();
+ $dataobj-&gt;clear_changed
+Clear any changed fields, which will result in them not being  committed unless force is used.
-use strict;
+This method is used by the [[API:EPrints/Database|EPrints::Database]] to avoid unnecessary  commits.
+<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
+<span style='display:none'>User Comments</span>
+<!-- Edit below this comment -->
-###################################################################### # $sys_fields = EPrints::DataObj-&gt;get_system_field_info #  # Return an array describing the system metadata of the this  # dataset. ######################################################################
-sub get_system_field_info {
+<!-- Pod2Wiki= -->
-	my( $class ) = @_;
+</div>
+<!-- Pod2Wiki=item_clear_citationcaches -->
+====clear_citationcaches====
-  return (); }
+ $dataobj-&gt;clear_citationcaches
+Clear any [[API:EPrints/DataObj/CitationCache|EPrints::DataObj::CitationCache]] objects associated with  the data object.
-###################################################################### =pod
 <div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
-<h4><span style='display:none'>User Comments</span></h4>
+<span style='display:none'>User Comments</span>
 <!-- Edit below this comment -->
-<!-- Pod2Wiki=item_new --></div>
+<!-- Pod2Wiki= -->
-===$dataobj = EPrints::DataObj-&gt;new( $handle, $id [, $dataset] )===
+</div>
+<!-- Pod2Wiki=item_commit -->
+====commit====
+ $success = $dataobj-&gt;commit( [ $force ] )
+Write this object to the database and reset the changed fields.
-Return new data object, created by loading it from the database.
+If <tt>$force</tt> isn't true then it only actually modifies the database if  one or more fields have been changed.
-If $dataset is not defined uses the default dataset for this object.
+Commit may also queue indexer jobs or log changes, depending on the  object.
 <div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
-<h4><span style='display:none'>User Comments</span></h4>
+<span style='display:none'>User Comments</span>
 <!-- Edit below this comment -->
-<!-- Pod2Wiki=item_get_handle --></div>
+<!-- Pod2Wiki= -->
-===$handle = $dataobj-&gt;get_handle===
+</div>
+<!-- Pod2Wiki=item_value -->
+====value====
-Returns the EPrints::Handle object to which this record belongs.
+ $value = $dataobj-&gt;value( $fieldname )
+Get a the value of a metadata field with <tt>$fieldname</tt>. If the field  is not set then it returns undef unless the field has the property  multiple set, in which case it returns [] (a reference to an empty a rray).
+Alias for:
+ $dataobj-&gt;get_value( $fieldname )
 <div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
-<h4><span style='display:none'>User Comments</span></h4>
+<span style='display:none'>User Comments</span>
 <!-- Edit below this comment -->
-<!-- Pod2Wiki=item_remove --></div>
+<!-- Pod2Wiki= -->
-===$success = $dataobj-&gt;remove===
+</div>
+<!-- Pod2Wiki=item_set_value -->
+====set_value====
+ $dataobj-&gt;set_value( $fieldname, $value )
+Set the <tt>$value</tt> of the named metadata field <tt>$fieldname</tt> for this data object.
+<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
+<span style='display:none'>User Comments</span>
+<!-- Edit below this comment -->
-Remove this data object from the database and any sub-objects or related files.
+<!-- Pod2Wiki= -->
+</div>
+<!-- Pod2Wiki=item_set_value_raw -->
+====set_value_raw====
-Return true if successful.
+ $dataobj-&gt;set_value_raw( $fieldname, $value )
+Set the <tt>$value</tt> of the named metadata field <tt>$fieldname</tt> for this data object by directly modifying its <tt>data</tt> hash reference. Use  with care!
 <div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
-<h4><span style='display:none'>User Comments</span></h4>
+<span style='display:none'>User Comments</span>
 <!-- Edit below this comment -->
-<!-- Pod2Wiki=item_commit --></div>
+<!-- Pod2Wiki= -->
-===$success = $dataobj-&gt;commit( [$force] )===
+</div>
+<!-- Pod2Wiki=item_get_values -->
+====get_values====
+ @values = $dataobj-&gt;get_values( $fieldnames )
+Returns a list of all the values in this record of all the $fields  specified by <tt>$fieldnames</tt>. These should be in the format used by  browse views, using <tt>/</tt> to seperate individual field names with an  optional <tt>.id</tt> suffix to indicate the ID part rather than the main  part.
+E.g. <tt>author.id/editor.id</tt> would return a list of all author and  editor IDs from this record.
-Write this object to the database and reset the changed fields.
+<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
+<span style='display:none'>User Comments</span>
+<!-- Edit below this comment -->
+<!-- Pod2Wiki= -->
+</div>
+<!-- Pod2Wiki=item_repository -->
+====repository====
-If $force isn't true then it only actually modifies the database if one or more fields have been changed.
+ $session = $dataobj-&gt;repository
+Returns the [[API:EPrints/Repository|EPrints::Repository]] object to which this record  belongs.
-Commit may also queue indexer jobs or log changes, depending on the object.
+Alias for:
+ $dataobj-&gt;get_session
 <div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
-<h4><span style='display:none'>User Comments</span></h4>
+<span style='display:none'>User Comments</span>
 <!-- Edit below this comment -->
-<!-- Pod2Wiki=item_get_value --></div>
+<!-- Pod2Wiki= -->
-===$value = $dataobj-&gt;get_value( $fieldname )===
+</div>
+<!-- Pod2Wiki=item_get_data -->
+====get_data====
-Get a the value of a metadata field. If the field is not set then it returns undef unless the field has the property multiple set, in which case it returns  [] (a reference to an empty array).
+ $data = $dataobj-&gt;get_data
+Returns a reference to the hash of all the metadata for this record  keyed by fieldname.
 <div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
-<h4><span style='display:none'>User Comments</span></h4>
+<span style='display:none'>User Comments</span>
 <!-- Edit below this comment -->
-<!-- Pod2Wiki=item_set_value --></div>
+<!-- Pod2Wiki= -->
-===$dataobj-&gt;set_value( $fieldname, $value )===
+</div>
+<!-- Pod2Wiki=item_get_dataset -->
+====get_dataset====
-Set the value of the named metadata field in this record.
+ $dataset = $dataobj-&gt;get_dataset
+Returns the [[API:EPrints/DataSet|EPrints::DataSet]] object to which this record belongs.
 <div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
-<h4><span style='display:none'>User Comments</span></h4>
+<span style='display:none'>User Comments</span>
 <!-- Edit below this comment -->
-<!-- Pod2Wiki=item_get_values --></div>
+<!-- Pod2Wiki= -->
-===@values = $dataobj-&gt;get_values( $fieldnames )===
+</div>
+<!-- Pod2Wiki=item_is_set -->
+====is_set====
-Returns a list of all the values in this record of all the fields specified by $fieldnames. $fieldnames should be in the format used by browse views - slash seperated fieldnames with an optional .id suffix to indicate the id part rather than the main part.
+ $boolean = $dataobj-&gt;is_set( $fieldname )
+Returns <tt>true</tt> if the field with <tt>$fieldname</tt> is set in this record,  otherwise <tt>false</tt>.
-For example "author.id/editor.id" would return a list of all author and editor ids from this record.
+Warns if the field with <tt>$fieldname</tt> does not exist.
 <div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
-<h4><span style='display:none'>User Comments</span></h4>
+<span style='display:none'>User Comments</span>
 <!-- Edit below this comment -->
-<!-- Pod2Wiki=item_get_data --></div>
+<!-- Pod2Wiki= -->
-===$data = $dataobj-&gt;get_data===
+</div>
+<!-- Pod2Wiki=item_exists_and_set -->
+====exists_and_set====
-Returns a reference to the hash table of all the metadata for this record keyed  by fieldname.
+ $boolean = $dataobj-&gt;exists_and_set( $fieldname )
+Returns <tt>true</tt> if the field with <tt>$fieldname</tt> is set in this record,  otherwise <tt>false</tt>.
+If the field does not exist, just return <tt>false</tt>.
+This method is useful for plugins which may operate on multiple  repositories, when field not existing is not an issue for a particular repository.
 <div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
-<h4><span style='display:none'>User Comments</span></h4>
+<span style='display:none'>User Comments</span>
 <!-- Edit below this comment -->
-<!-- Pod2Wiki=item_is_set --></div>
+<!-- Pod2Wiki= -->
-===$bool = $dataobj-&gt;is_set( $fieldname )===
+</div>
+<!-- Pod2Wiki=item_id -->
+====id====
-Returns true if the named field is set in this record, otherwise false.
+ $id = $dataobj-&gt;id
+Returns the value of the primary key of this record.
-Warns if the field does not exist.
+Alias for:
+ $dataobj-&gt;get_id
 <div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
-<h4><span style='display:none'>User Comments</span></h4>
+<span style='display:none'>User Comments</span>
 <!-- Edit below this comment -->
-<!-- Pod2Wiki=item_exists_and_set --></div>
+<!-- Pod2Wiki= -->
-===$bool = $dataobj-&gt;exists_and_set( $fieldname )===
+</div>
+<!-- Pod2Wiki=item_get_gid -->
+====get_gid====
-Returns true if the named field is set in this record, otherwise false.
+ $gid = $dataobj-&gt;get_gid
+DEPRECATED (see [[API:EPrints/DataObj#uri|uri]])
-If the field does not exist, just return false.
+Returns the globally referential fully-qualified identifier for this  data object or <tt>undef</tt> if this object can not be externally  referenced.
-This method is useful for plugins which may operate on multiple  repositories, and the fact a field does not exist is not an issue.
+<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
+<span style='display:none'>User Comments</span>
+<!-- Edit below this comment -->
+<!-- Pod2Wiki= -->
+</div>
+<!-- Pod2Wiki=item_get_datestamp -->
+====get_datestamp====
+ $datestamp = $dataobj-&gt;get_datestamp
+Returns the datestamp of this object in "YYYY-MM-DD hh:mm:ss" format.
 <div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
-<h4><span style='display:none'>User Comments</span></h4>
+<span style='display:none'>User Comments</span>
 <!-- Edit below this comment -->
-<!-- Pod2Wiki=item_render_value --></div>
+<!-- Pod2Wiki= -->
-===$xhtml = $dataobj-&gt;render_value( $fieldname, [$showall] )===
+</div>
+<!-- Pod2Wiki=item_render_value -->
+====render_value====
-Returns the rendered version of the value of the given field, as appropriate for the current session. If $showall is true then all values are rendered -  this is usually used for staff viewing data.
+ $xhtml = $dataobj-&gt;render_value( $fieldname, [ $showall ] )
+Returns the rendered version of the value of the given <tt>$fieldname</tt>  as appropriate for the current session. If <tt>$showall</tt> is <tt>true</tt> then  all values are rendered - this is usually used for staff viewing data.
 <div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
-<h4><span style='display:none'>User Comments</span></h4>
+<span style='display:none'>User Comments</span>
 <!-- Edit below this comment -->
-<!-- Pod2Wiki=item_render_citation --></div>
+<!-- Pod2Wiki= -->
-===$xhtml = $dataobj-&gt;render_citation( [$style], [%params] )===
+</div>
+<!-- Pod2Wiki=item_render_citation -->
+====render_citation====
+ $xhtml = $dataobj-&gt;render_citation( [ $style, %params ] )
+Renders the record as a citation. If $style is set then it uses that  citation style from the citations config file. Otherwise <tt>$style</tt> defaults to the type of this record. If <tt>$params{url}</tt> is set then  the citation will link to the specified URL.
-Renders the record as a citation. If $style is set then it uses that citation style from the citations config file. Otherwise $style defaults to the type of this record. If $params{url} is set then the citiation will link to the specified URL.
+If <tt>$style</tt> is unset then use <tt>default</tt>.
 <div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
-<h4><span style='display:none'>User Comments</span></h4>
+<span style='display:none'>User Comments</span>
 <!-- Edit below this comment -->
-<!-- Pod2Wiki=item_render_citation_link --></div>
+<!-- Pod2Wiki= -->
-===$xhtml = $dataobj-&gt;render_citation_link( [$style], %params )===
+</div>
+<!-- Pod2Wiki=item_render_citation_link -->
+====render_citation_link====
-Renders a citation (as above) but as a link to the URL for this item. For example - the abstract page of an eprint.
+ $xhtml = $dataobj-&gt;render_citation_link( [ $style, %params ] )
+Renders a citation as like [[API:EPrints/DataObj#render_citation|render_citation]] but as a link to the  URL for this item. E.g. the abstract page of an eprint.
+<tt>$params{url}</tt> is set to data object's URL if not set.
 <div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
-<h4><span style='display:none'>User Comments</span></h4>
+<span style='display:none'>User Comments</span>
 <!-- Edit below this comment -->
-<!-- Pod2Wiki=item_render_citation_link_staff --></div>
+<!-- Pod2Wiki= -->
-===$xhtml = $dataobj-&gt;render_citation_link_staff( [$style], %params )===
+</div>
+<!-- Pod2Wiki=item_render_citation_link -->
+====render_citation_link====
-As for render_citation_link but the link goes to the edit URL for the item.
+ $xhtml = $dataobj-&gt;render_citation_link( [ $style, %params ] )
+Renders a citation as like [[API:EPrints/DataObj#render_citation|render_citation]] but as a link to the control URL for this item. E.g. for items that are not yet in the live archive.
 <div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
-<h4><span style='display:none'>User Comments</span></h4>
+<span style='display:none'>User Comments</span>
 <!-- Edit below this comment -->
-<!-- Pod2Wiki=item_render_description --></div>
+<!-- Pod2Wiki= -->
-===$xhtml = $dataobj-&gt;render_description===
+</div>
+<!-- Pod2Wiki=item_render_description -->
+====render_description====
-Returns a short description of this object using the "brief" citation style for this dataset.
+ $xhtml = $dataobj-&gt;render_description
+Returns a short description of this object using the <tt>brief</tt> citation  style for this dataset or the <tt>default</tt> citation style of the former does not exist.
 <div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
-<h4><span style='display:none'>User Comments</span></h4>
+<span style='display:none'>User Comments</span>
 <!-- Edit below this comment -->
-<!-- Pod2Wiki=item_render --></div>
+<!-- Pod2Wiki= -->
-===($xhtml, $title ) = $dataobj-&gt;render===
+</div>
+<!-- Pod2Wiki=item_render -->
+====render====
+ ( $xhtml, $title ) = $dataobj-&gt;render
 Return a chunk of XHTML DOM describing this object in the normal way. This is the public view of the record, not the staff view.
 <div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
-<h4><span style='display:none'>User Comments</span></h4>
+<span style='display:none'>User Comments</span>
 <!-- Edit below this comment -->
-<!-- Pod2Wiki=item_render_full --></div>
+<!-- Pod2Wiki= -->
-===($xhtml, $title ) = $dataobj-&gt;render_full===
+</div>
+<!-- Pod2Wiki=item_render_full -->
+====render_full====
+ $xhtml = $dataobj-&gt;render_full
 Return an XHTML table in DOM describing this record. All values of all fields are listed. This is the staff view.
 <div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
-<h4><span style='display:none'>User Comments</span></h4>
+<span style='display:none'>User Comments</span>
+<!-- Edit below this comment -->
+<!-- Pod2Wiki= -->
+</div>
+<!-- Pod2Wiki=item_render_export_links -->
+====render_export_links====
+ $xhtml_ul_list = $dataobj-&gt;render_export_links( [ $staff ] )
+Return a <tt>&lt;ul&gt;</tt> list containing links to all the formats this  eprint is available in.
+If <tt>$staff</tt> is <tt>true</tt> then show all formats available to staff and  link to the staff export URL.
+<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
+<span style='display:none'>User Comments</span>
 <!-- Edit below this comment -->
-<!-- Pod2Wiki=item_get_id --></div>
+<!-- Pod2Wiki= -->
-===$id = $dataobj-&gt;get_id===
+</div>
+<!-- Pod2Wiki=item_render_export_bar -->
+====render_export_bar====
+ $xhtml = $dataobj-&gt;render_export_bar( [ $staff ] )
+Returns a rendered drop-down list of exports.
+If <tt>$staff</tt> is <tt>true</tt> then include both public and staff visible  export options.
-Returns the value of the primary key of this record.
+<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
+<span style='display:none'>User Comments</span>
+<!-- Edit below this comment -->
+<!-- Pod2Wiki= -->
+</div>
+<!-- Pod2Wiki=item_uri -->
+====uri====
+ $url = $dataobj-&gt;uri
+Returns a unique URI for this object. Not certain to resolve as a  URL.
+If <tt>$c-</tt>{dataobj_uri}-&gt;{eprint}&gt; is a function, call that to work  it out.
 <div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
-<h4><span style='display:none'>User Comments</span></h4>
+<span style='display:none'>User Comments</span>
 <!-- Edit below this comment -->
-<!-- Pod2Wiki=item_get_dataset --></div>
+<!-- Pod2Wiki= -->
-===$dataset = $dataobj-&gt;get_dataset===
+</div>
+<!-- Pod2Wiki=item_internal_uri -->
+====internal_uri====
-Returns the [[API:EPrints/DataSet|EPrints::DataSet]] object to which this record belongs.
+ $uri = $dataobj-&gt;internal_uri
+Return an internal URI for this object (independent of repository hostname).
+To retrieve an object by internal URI use  [[API:EPrints/DataSet|EPrints::DataSet]]::get_object_from_uri().
 <div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
-<h4><span style='display:none'>User Comments</span></h4>
+<span style='display:none'>User Comments</span>
 <!-- Edit below this comment -->
-<!-- Pod2Wiki=item_uri --></div>
+<!-- Pod2Wiki= -->
-===$uri = $dataobj-&gt;uri===
+</div>
+<!-- Pod2Wiki=item_path -->
+====path====
-Returns a unique URI for this object. Not certain to resolve as a URL.
+ $path = $dataobj-&gt;path
+Returns the relative path to this object from the repository's base  URL, if the object has a URL.
-The URI is generally of the form <em>repository_url</em>/id/<em>datasetid</em>/<em>dataobj_id</em>
+Does not include any leading slash.
 <div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
-<h4><span style='display:none'>User Comments</span></h4>
+<span style='display:none'>User Comments</span>
 <!-- Edit below this comment -->
-<!-- Pod2Wiki=item_get_url --></div>
+<!-- Pod2Wiki= -->
-===$url = $dataobj-&gt;get_url===
+</div>
+<!-- Pod2Wiki=item_url -->
+====url====
-Returns the URL for this record, for example the URL of the abstract page of an eprint.
+ $url = $dataobj-&gt;url
+Returns the URL for this record, e.g.the URL of the abstract page of  an eprint.
+Alias for:
+ $dataobj-&gt;get_url
 <div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
-<h4><span style='display:none'>User Comments</span></h4>
+<span style='display:none'>User Comments</span>
 <!-- Edit below this comment -->
-<!-- Pod2Wiki=item_get_control_url --></div>
+<!-- Pod2Wiki= -->
-===$url = $dataobj-&gt;get_control_url===
+</div>
+<!-- Pod2Wiki=item_get_control_url -->
+====get_control_url====
+ $url = $dataobj-&gt;get_control_url
 Returns the URL for the control page for this object.
 <div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
-<h4><span style='display:none'>User Comments</span></h4>
+<span style='display:none'>User Comments</span>
 <!-- Edit below this comment -->
-<!-- Pod2Wiki=item_export --></div>
+<!-- Pod2Wiki= -->
-===$plugin_output = $dataobj-&gt;export( $plugin_id [,%params] )===
+</div>
+<!-- Pod2Wiki=item_get_type -->
+====get_type====
+ $type = $dataobj-&gt;get_type
+ABSTRACT.
-Apply an output plugin to this items. Return the results. No additional parameters are required for most export plugins.
+Returns the type of this data object. This not the dataset it belongs to but the specific type within the dataset (e.g. c&lt;user&gt; could be <tt>editor</tt>, <tt>admin</tt>, etc.).
 <div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
-<h4><span style='display:none'>User Comments</span></h4>
+<span style='display:none'>User Comments</span>
 <!-- Edit below this comment -->
-<!-- Pod2Wiki=item_has_owner --></div>
+<!-- Pod2Wiki= -->
-===$boolean = $dataobj-&gt;has_owner( $user )===
+</div>
+<!-- Pod2Wiki=item_to_xml -->
+====to_xml====
-Return true if $user owns this record. Normally this means they  created it, but a group of users could count as owners of the same record if you wanted.
+ $xmlfragment = $dataobj-&gt;to_xml( %opts )
+Convert this object into an XML fragment using options <tt>%opts</tt>.
-It's false on most dataobjs, except those which override this method.
+Options:
+ no_xmlns - Do not include a xmlns attribute in the outer element.
+ (This assumes this chunk appears in a larger tree where the xmlns is
+ already set correctly.
+ showempty - Fields with no value are shown.
+ embed - Include the data of a file, not just it's URL.
 <div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
-<h4><span style='display:none'>User Comments</span></h4>
+<span style='display:none'>User Comments</span>
 <!-- Edit below this comment -->
-<!-- Pod2Wiki=item_in_editorial_scope_of --></div>
+<!-- Pod2Wiki= -->
-===$boolean = $dataobj-&gt;in_editorial_scope_of( $user )===
+</div>
+<!-- Pod2Wiki=item_to_sax -->
+====to_sax====
+ $dataobj-&gt;to_sax( %opts )
+Stream this object to a SAX handler using the options in <tt>$opts</tt>.
-As for has_owner, but if the user is identified as someone with an editorial scope which includes this record.
+Options:
+ Handler - the SAX handler to build the output.
+ revision_generation - Generate XML for revision files rather than
+ export.
-Defaults to true. Which doesn't mean that they have the right to  edit it, just that their scope matches. You also need editor rights to use this. It's currently used just to filter eprint editors so that only ones with a scope AND a priv can edit.
+This does not output any document-level events.
 <div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
-<h4><span style='display:none'>User Comments</span></h4>
+<span style='display:none'>User Comments</span>
 <!-- Edit below this comment -->
-<!-- Pod2Wiki=item_validate --></div>
+<!-- Pod2Wiki= -->
-===$problems = $dataobj-&gt;validate( [ $for_archive ], $workflow_id )===
+</div>
+<!-- Pod2Wiki=item_export -->
+====export====
+ $plugin_output = $dataobj-&gt;export( $plugin_id, %params )
+Apply an export plugin with <tt>$plugin_id</tt> to this data object, using  the parameters provided by <tt>%params</tt> and supplying them to the <tt>output_dataobj</tt> method of the [[API:EPrints/Plugin:Export|EPrints::Plugin:Export]] plugin.
+Return the output of the export plugin.
+<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
+<span style='display:none'>User Comments</span>
+<!-- Edit below this comment -->
-Return a reference to an array of XHTML DOM objects describing validation problems with the entire $dataobj based on $workflow_id.
-If $workflow_id is undefined defaults to "default".
+<!-- Pod2Wiki= -->
+</div>
+<!-- Pod2Wiki=item_queue_changes -->
+====queue_changes====
+ $dataobj-&gt;queue_changes
+Add all the changed fields into the indexers todo queue.
+<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
+<span style='display:none'>User Comments</span>
+<!-- Edit below this comment -->
+<!-- Pod2Wiki= -->
+</div>
+<!-- Pod2Wiki=item_queue_all -->
+====queue_all====
+ $dataobj-&gt;queue_all
+Add all the fields into the indexers todo queue.
+<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
+<span style='display:none'>User Comments</span>
+<!-- Edit below this comment -->
+<!-- Pod2Wiki= -->
+</div>
+<!-- Pod2Wiki=item_queue_fulltext -->
+====queue_fulltext====
+ $dataobj-&gt;queue_fulltext
+Add a fulltext index into the indexers todo queue.
+<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
+<span style='display:none'>User Comments</span>
+<!-- Edit below this comment -->
+<!-- Pod2Wiki= -->
+</div>
+<!-- Pod2Wiki=item_queue_removed -->
+====queue_removed====
+ $dataobj-&gt;queue_removed
+Add an index removed event to the indexer's queue.
+<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
+<span style='display:none'>User Comments</span>
+<!-- Edit below this comment -->
+<!-- Pod2Wiki= -->
+</div>
+<!-- Pod2Wiki=item_has_owner -->
+====has_owner====
+ $boolean = $dataobj-&gt;has_owner( $user )
+Return <tt>true</tt> if <tt>$user</tt> owns this record. Normally this means they  created it, but a group of users could count as owners of the same record if you wanted.
+It's <tt>false</tt> on most data objects, except those which override this  method.
+<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
+<span style='display:none'>User Comments</span>
+<!-- Edit below this comment -->
+<!-- Pod2Wiki= -->
+</div>
+<!-- Pod2Wiki=item_permit -->
+====permit====
+ $rc = $dataobj-&gt;permit( $priv, [ $user ] )
+  # current user can edit via editorial role
+  if( $dataobj-&gt;permit( "xxx/edit", $user ) &amp; 8 )
+  {
+    ...
+  }
+  # anyone can view this object
+  if( $dataobj-&gt;permit( "xxx/view" ) )
+  {
+  }
+Returns <tt>true</tt> if the specified <tt>$user</tt> (or 'anybody') can perform  this action.
+Returns a bit mask where:
+- not permitted
+- anybody
+- logged in user
+- user as owner
+- user as editor
+See also [[API:EPrints/Repository#allow_anybody|EPrints::Repository/allow_anybody]] and  [[API:EPrints/DataObj/User#allow|EPrints::DataObj::User/allow]].
+<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
+<span style='display:none'>User Comments</span>
+<!-- Edit below this comment -->
+<!-- Pod2Wiki= -->
+</div>
+<!-- Pod2Wiki=item_in_editorial_scope_of -->
+====in_editorial_scope_of====
+ $boolean = $dataobj-&gt;in_editorial_scope_of( $user )
+As for [[API:EPrints/DataObj#has_owner|has_owner]], but if the <tt>$user</tt> is identified as someone  with an editorial scope which includes this record.
+Defaults to <tt>true</tt>. Which doesn't mean that they have the right to  edit it, just that their scope matches. You also need editor rights to use this. It's currently used just to filter eprint editors so that only ones with appropriate scope and privilege can edit.
+<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
+<span style='display:none'>User Comments</span>
+<!-- Edit below this comment -->
+<!-- Pod2Wiki= -->
+</div>
+<!-- Pod2Wiki=item_validate -->
+====validate====
+ $problems = $dataobj-&gt;validate( $for_archive )
+Validate this data object. Not used on all sub-classed. <tt>$for_archive</tt>  being <tt>true</tt> indicates that the item is beting validated to go live.
+Returns a reference to an array of XHTML DOM objects describing validation problems with the entire data object for the supplied  <tt>$for_archive</tt> archive ID.
+A reference to an empty array indicates no problems.
+<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
+<span style='display:none'>User Comments</span>
+<!-- Edit below this comment -->
+<!-- Pod2Wiki= -->
+</div>
+<!-- Pod2Wiki=item_get_warnings -->
+====get_warnings====
+ $warnings = $dataobj-&gt;get_warnings
+Returns a reference to an array of XHTML DOM objects describing problems with the entire data object.
 A reference to an empty array indicates no problems.
 <div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
-<h4><span style='display:none'>User Comments</span></h4>
+<span style='display:none'>User Comments</span>
 <!-- Edit below this comment -->
-<!-- Pod2Wiki=item_get_warnings --></div>
+<!-- Pod2Wiki= -->
-===$warnings = $dataobj-&gt;get_warnings( )===
+</div>
+<!-- Pod2Wiki=item_validate_field -->
+====validate_field====
+ @problems = $dataobj-&gt;validate_field( $fieldname )
+Check if a field named <tt>$fieldname</tt> is valid.
-Return a reference to an array of XHTML DOM objects describing problems with the entire $dataobj.
+Returns a reference to an array of XHTML problems.
 A reference to an empty array indicates no problems.
 <div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
-<h4><span style='display:none'>User Comments</span></h4>
+<span style='display:none'>User Comments</span>
 <!-- Edit below this comment -->
-<!-- Pod2Wiki=item_add_stored_file --></div>
+<!-- Pod2Wiki= -->
-===$file = $dataobj-&gt;add_stored_file( $filename, $filehandle [, $filesize ] )===
+</div>
+<!-- Pod2Wiki=item_tidy -->
+====tidy====
-Convenience method to add the file record for $filename to this object. Reads data from $filehandle. If $filesize is defined it may used to determine where the file should be stored.
+ $dataobj-&gt;tidy
+Cleans up any multiple fields with gaps.
-Returns the file object or undef if the storage failed.
+<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
+<span style='display:none'>User Comments</span>
+<!-- Edit below this comment -->
+<!-- Pod2Wiki= -->
+</div>
+<!-- Pod2Wiki=item_add_stored_file -->
+====add_stored_file====
+ $file = $dataobj-&gt;add_stored_file( $filename, $filehandle, $filesize )
+Convenience method to add (or replace) the file record for  <tt>$filename</tt> to this object. Reads <tt>$filesize</tt> bytes from  <tt>$filehandle</tt>.
+Returns the file object or <tt>undef</tt> if the storage failed.
 <div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
-<h4><span style='display:none'>User Comments</span></h4>
+<span style='display:none'>User Comments</span>
 <!-- Edit below this comment -->
-<!-- Pod2Wiki=item_get_stored_file --></div>
+<!-- Pod2Wiki= -->
-===$file = $dataobj-&gt;get_stored_file( $filename )===
+</div>
+<!-- Pod2Wiki=item_stored_file -->
+====stored_file====
-Get the file object for $filename.
+ $file = $dataobj-&gt;stored_file( $filename )
+Get the file object for <tt>$filename</tt>.
-Returns the file object or undef if the file doesn't exist.
+Returns the file object or <tt>undef</tt> if the file doesn't exist.
+Has alias:
+ $dataobj-&gt;get_stored_file( $filename )
 <div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
-<h4><span style='display:none'>User Comments</span></h4>
+<span style='display:none'>User Comments</span>
 <!-- Edit below this comment -->
-<!-- Pod2Wiki=head_related_objects --></div>
+<!-- Pod2Wiki= -->
-===Related Objects===
+</div>
-These methods have been introduced in ep3.2 to describe the relationships between objects in the system.
+<!-- Pod2Wiki=item_add_dataobj_relations -->
+====add_dataobj_relations====
+ $dataobj-&gt;add_dataobj_relations( $target, %relations )
+Add a relation from this data object to the <tt>$target</tt> data object  using predicates defined in the keys of the <tt>%relations</tt> hash. If  values are defined in the hash reciprocal relationships from the  <tt>$target</tt> data object to this data object are also.
-See the wiki for more detailed discussion of how to use these.
+You must commit <tt>$target</tt> data object after calling this method.
-  $dataobj-&gt;add_object_relations( $target, $has =&gt; $is [, $has =&gt; $is ] )
+Has alias:
-  $bool = $dataobj-&gt;has_object_relations( $target, @types )
-  $bool = $dataobj-&gt;has_related_objects( @types )
+ $dataobj-&gt;add_object_relations( $target, %relations )
-  $dataobjs = $dataobj-&gt;get_related_objects( @types )
-  $dataobj-&gt;remove_object_relations( $target [, $has =&gt; $is [, $has =&gt; $is ] )
 <div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
-<h4><span style='display:none'>User Comments</span></h4>
+<span style='display:none'>User Comments</span>
 <!-- Edit below this comment -->
-<!-- Pod2Wiki=item_add_object_relations --></div>
+<!-- Pod2Wiki= -->
-====$dataobj-&gt;add_object_relations( $target, $has =&gt; $is [, $has =&gt; $is ] )====
+</div>
+<!-- Pod2Wiki=item_has_dataobj_relations -->
+====has_dataobj_relations====
+ $boolean = $dataobj-&gt;has_dataobj_relations( $target, @required )
+Returns <tt>true</tt> if this object is related to <tt>$target</tt> by all  <tt>@required</tt>.
-Add a relation between this object and $target of type $has. If $is is defined will also add the reciprocal relationship $is from $target to this object. May be repeated to add multiple relationships.
+If <tt>@required</tt> is empty will return <tt>true</tt> if any relationships  exist.
-You must commit $target after calling this method.
+Has alias:
+ $dataobj-&gt;has_object_relations( $target, @required )
 <div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
-<h4><span style='display:none'>User Comments</span></h4>
+<span style='display:none'>User Comments</span>
 <!-- Edit below this comment -->
-<!-- Pod2Wiki=item_has_object_relations --></div>
+<!-- Pod2Wiki= -->
-====$bool = $dataobj-&gt;has_object_relations( $target, @types )====
+</div>
+<!-- Pod2Wiki=item_has_related_dataobjs -->
+====has_related_dataobjs====
-Returns true if this object is related to $target by all @types.
+ $boolean = $dataobj-&gt;has_related_dataobjs( @required )
+Returns <tt>true</tt> if [[API:EPrints/DataObj#related_dataobjs|related_dataobjs]] would return some objects but  without actually retrieving the related objects from the database.
-If @types is empty will return true if any relationships exist.
+Has alias:
+ $dataobj-&gt;has_related_objects( @required )
 <div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
-<h4><span style='display:none'>User Comments</span></h4>
+<span style='display:none'>User Comments</span>
 <!-- Edit below this comment -->
-<!-- Pod2Wiki=item_has_related_objects --></div>
+<!-- Pod2Wiki= -->
-====$bool = $dataobj-&gt;has_related_objects( @types )====
+</div>
+<!-- Pod2Wiki=item_related_dataobjs -->
+====related_dataobjs====
-Returns true if get_related_objects() would return some objects, but without actually retrieving the related objects from the database.
+ @dataobjs = $dataobj-&gt;related_dataobjs( @required )
+Returns a list of objects related to this data object by a relation in <tt>@required</tt>.
+Has alias:
+ $dataobj-&gt;get_related_objects( @required )
 <div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
-<h4><span style='display:none'>User Comments</span></h4>
+<span style='display:none'>User Comments</span>
 <!-- Edit below this comment -->
-<!-- Pod2Wiki=item_get_related_objects --></div>
+<!-- Pod2Wiki= -->
-====$dataobjs = $dataobj-&gt;get_related_objects( @types )====
+</div>
+<!-- Pod2Wiki=item_remove_dataobj_relations -->
+====remove_dataobj_relations====
-Returns a list of objects related to this object by @types.
+ $dataobj-&gt;remove_dataobj_relations( $target, %relations )
+Remove relations between this data object and the <tt>$target</tt> data  object. If <tt>%relations</tt> is not empty only remove those relationships which are keys in this hash.
+You must [[API:EPrints/DataObj#commit|commit]] this object and <tt>$target</tt> to write the changes.
+Has alias:
+ $dataobj-&gt;remove_object_relations( $target, %relations )
 <div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
-<h4><span style='display:none'>User Comments</span></h4>
+<span style='display:none'>User Comments</span>
 <!-- Edit below this comment -->
-<!-- Pod2Wiki=item_remove_object_relations --></div>
+<!-- Pod2Wiki= -->
-====$dataobj-&gt;remove_object_relations( $target [, $has =&gt; $is [, $has =&gt; $is ] )====
+</div>
+<!-- Pod2Wiki=head_see_also -->
+==SEE ALSO==
+[[API:EPrints/DataSet|EPrints::DataSet]]
-Remove relations between this object and $target. If $has =&gt; $is pairs are defined will only remove those relationships given.
+<div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
+<span style='display:none'>User Comments</span>
+<!-- Edit below this comment -->
-You must commit $target after calling this method.
+<!-- Pod2Wiki= -->
+</div>
+<!-- Pod2Wiki=head_copyright -->
+==COPYRIGHT==
+{{API:Copyright}}
 <div style='background-color: #e8e8f; margin: 0.5em 0em 1em 0em; border: solid 1px #cce;  padding: 0em 1em 0em 1em; font-size: 80%; '>
-<h4><span style='display:none'>User Comments</span></h4>
+<span style='display:none'>User Comments</span>
 <!-- Edit below this comment -->
+<!-- Pod2Wiki= -->
+</div>
 <!-- Pod2Wiki=_postamble_ --><!-- Edit below this comment -->

Difference between revisions of "API:EPrints/DataObj"

Latest revision as of 16:41, 10 January 2022

Contents

NAME

DESCRIPTION

Synopsis

CORE METADATA FIELDS

REFERENCES AND RELATED OBJECTS

INSTANCE VARIABLES

$self->{changed}

$self->{data}

$self->{dataset}

$self->{non_volatile_change}

$self->{session}

$self->{under_construction}

METHODS

Constructor Methods

new

new_from_data

create

create_from_data

Class Methods

get_system_field_info

get_defaults

get_dataset_id

xml_to_epdata

export_fieldlist

in_export_fieldlist

start_element

end_element

characters

Object Methods

clone

create_subdataobj

local_path

update_triggers

delete

empty

update

set_under_construction

under_construction

clear_changed

clear_citationcaches

commit

value

set_value

set_value_raw

get_values

repository

get_data

get_dataset

is_set

exists_and_set

id

get_gid

get_datestamp

render_value

render_citation

render_citation_link

render_citation_link

render_description

render

render_full

render_export_links

render_export_bar

uri

internal_uri

path

url

get_control_url

get_type

to_xml

to_sax

export

queue_changes

queue_all

queue_fulltext

queue_removed

has_owner

permit