EPrints Control Format

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

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XML Configuration: EPScript - Control Format (EPC) - Citation - Workflow - Phrase - Template - XPAGE (static pages)

EPrints Control

Output Tags

epc:print

<epc:print expr='expression' opt='key=value;key2=value2'/>

<cite:citation xmlns="http://www.w3.org/1999/xhtml"
          xmlns:cite="http://eprints.org/ep3/citation"
          xmlns:epc="http://eprints.org/ep3/control">
    <epc:print expr="$item.citation('default')" />
</cite:citation> 

Outputs the result of the expression in the 'expr' attribute.

Expressions can include:

$config{xxx} - a value from the configuration.

$current_user - the current user. So you print $current_user{username}

$current_lang - the id of the current language eg 'en'

$item - the current item (usually an eprint, but not always, eg in citations or workflows for user objects). So you can print $item{eprintid}. If you just use {eprintid} it is a shortcut for {$item{eprintid}}

Rendering options may be passed in the opt attribute using a key=value form, with semicolons separating multiple options.

epc:phrase

<epc:phrase ref='phraseid'>
  <epc:param name='somepin'>Content</epc:param>
</epc:phrase>

Outputs the content of the phrase refered to by 'ref'. Any necessary parameters may be set using the <epc:param> tag, with the contents inserted into the pin with the name corresponding to the name attribute.

Conditional Tags

epc:if

<epc:if test='expr'>
...
</epc:if>

Outputs any XHTML content and evaluates any EPrints Control structures within the epc:if block if the expression in the test attribute is true.

epc:choose

<epc:choose>
  <epc:when test='expr'> 
  ...
  </epc:when>
  <epc:when test='expr2'> 
  ...
  </epc:when>
  <epc:otherwise>
  ...
  </epc:otherwise>
</epc:choose>

epc:choose allows for the construction of a complex conditional. Each epc:when block's 'test' attribute is evaluated, and the content of the block is returned if the result is true. If no expressions return true, the optional epc:otherwise block is returned. Note that no subsequent epc:when blocks are evaluated once the first block to return true is reached.