Editing Template:EPrints Metadata Fields Content (section)

=== Other Properties ===
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! Name !! Default Value !! Required !! Description !! Notes
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| '''allow_null''' || <tt>1</tt> || NO || Whether the value(s) stored in the database when no input is entered should be <tt>NULL</tt> or an appropriate default value based on its database field type. || This should generally never be set to <tt>0</tt> and certainly should not be changed to <tt>0</tt> after the field has been added to the database.  You are much better off configuring a default value using <tt>[[eprint_fields_default.pl]]</tt> or similar.
|-
This may be applicable to [[Text field|text]]  
| '''can_clone''' || <tt>1</tt> || NO || Whether the value(s) for this field should be cloned if a new record is created.  || This property is mostly used by system fields such as <tt>dir</tt> or <tt>datestamp</tt>.  It is applicable when an eprint is cloned using the <tt>Use as template</tt> or <tt>New version</tt> action buttons.
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| '''export_as_xml''' || <tt>1</tt> || NO || Whether the field value(s) should be exported in an XML export. || This is handy to suppress either confidential or confusing fields, like the <tt>fileinfo</file> [[EPrints Glossary#System_field|system field]].
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| '''import''' || <tt>1</tt> || NO || Whether new data objects create from an import can set values for the field.  || E.g. <tt>eprintid</tt>, <tt>dir<tt> are determined when the eprint record is created.  Imported metadata would not choose an appropriate value for such fields.
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| '''replace_core''' ||| <tt>0</tt> || NO || Whether the field configuration should replace the exisiting [[EPrints Glossary#Core_field|core (system) field]] with the same <tt>name</tt> || This is useful for particularly bespoke requirements.  It should be used with great care, as system fields are usually hard-coded because they should not be changed.
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| '''show_in_fieldlist''' || <tt>1</tt> || NO || Whether to allow this field to appear in fields lists.  || If set to <tt>0</tt> will prevent this field appearing in [[Fields field]] lists.  This is primarily to allow you to remove it from the list of fields in the user configuration which are used to control which fields appear as columns in the Items and Review screens.
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| '''show_in_html''' || <tt>1</tt> || NO || Whether this field is not shown in the [[EPrints Glossary#Details_tab|Details tab]] of the [[EPrints Glossary#EPrint_control_page|eprint control page]]. || This is mostly used to hide confusing internal [[EPrints Glossary#System_field|system field]]s like <tt>dir</tt>.
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