Editing Template:EPrints Metadata Fields Content (section)

=== Ordering, Indexing and Searching ===

{| cellpadding="3" cellspacing="0" border="1"
! Name !! Default Value !! Required !! Description !! Notes
|-
| '''make_single_value_orderkey''' || <tt>undef</tt> || NO || The <tt>orderkey</tt> function (potentially language specific) used to order by this field. || This property allows you to define a function or refer to a predefined function to override the default EPrints' orderkey generation. This property is passed each value from multiple fields, in turn. It is passed: <code>$field, $value, $dataset</code> and returns an <tt>ordervalue</tt> string.
|-
| '''make_value_orderkey''' || <tt>undef</tt> || NO || Like <tt>make_single_value_orderkey</tt> but this is passed the array reference for a multiple field rather than just single values. || It should return the <tt>orderkey</tt> string for the entire value. It is passed: <code>$field, $value, $session, $langid, $dataset</code>.
|-
| '''match''' || <tt>EQ</tt> || NO || How to match the value(s) of this field against search terms. || This property can be <tt>EQ</tt>, <tt>EX</tt>, <tt>IN</tt> or <tt>SET</tt>.  Default <tt>EQ</tt> means treat the search term as a single string. Match only whole search term matches the field value (or one of its values if <code>multiple => 1</code>).  This can be modified for the [[API:EPrints/Search/Field|field in the search form configuration]].
|-
| '''merge''' || <tt>ALL</tt> || NO || Whether this field's values(s) has to match any or all of the search terms || This property can be <tt>ALL</tt> or <tt>ANY</tt>, Default <tt>ALL</tt> means all search terms have to match the values(s) in this field. This can be modified for the [[API:EPrints/Search/Field|field in the search form configuration]].  For certain values of <tt>match</tt> this can also be changed by the user in the search form itself.
|-
| '''text_index''' || <tt>0</tt> || NO || Whether the indexer considers this field for full-text indexing. || Some types of metadata field have a default of <tt>1</tt>, e.g. [[Text field]]s and [[Longtext field]]s.
|-
| '''search_cols''' || <tt>40</tt> || NO || How many characters (columns) wide the input field for searching this field. ||  The default value for this property is taken from <tt>cfg.d/[[field_property_defaults.pl]]</tt>.  If one search field searches more than one field, then the properties from the first field listed are used.
|}