= Add gco:CharacterString substitution group support and filter substitution element list =

|| '''Date''' || 2010/03/09 ||
|| '''Contact(s)''' || Francois ||
|| '''Last edited''' || [[Timestamp]] ||
|| '''Status''' || Draft ||
|| '''Assigned to release''' || 2.5 ||
|| '''Resources''' || GéoSource [BRGM] ||
|| '''Ticket''' ||  ||

== Overview ==
Actually, GeoNetwork ignore all gco:CharacterString substites due to the following lines in schema-substitutes.xml :
{{{
<!-- override all the schema substitutes for gco:CharacterString 
	- we don't want any--> 
	<field name="gco:CharacterString">
	</field> 
}}}
It also provide by default all substitutes of an element (see below). The proposal allows to filter these substitution lists.
[[Image(substition-group-all.png)]]

The idea of the proposal is to be able for some elements to be able to use one or more substitutes of gco:CharacterString. Indeed, some substitute like gmx:FileName or gmx:Anchor could be useful in some situation.

The proposal enhancements are :
 * Add configuration of allowed substitutes for an element
 * Add support for gmx:FileName to be used to store a document in the catalogue (added by default to otherCitationDetails)
 * Suggest only gml:Polygon for bounding polygon element.


=== Proposal Type ===
 * '''Type''': Editor
 * '''App''': !GeoNetwork
 * '''Module''': Editor

=== Links ===
 
 * '''Email discussions''': 
 * '''IRC discussions''': 

=== Voting History ===
 * Vote not yet proposed 

== Proposal details ==
=== Configuration ===

The file schema-substitutes.xml is modified to load gco:CharacterString on startup.
GMX schema is imported in schema.xsd.

=== Configuration for gmd:otherCitationDetails ===
In the schema-suggestion.xml, otherCitationDetails allows use of CharacterString or FileName
{{{
<field name="gmd:otherCitationDetails">
  <suggest name="gco:CharacterString"/>
  <suggest name="gmx:FileName"/>
</field> 
}}}

This will trigger the following in the editor :
[[Image(substition-group-otherCitationDetails.png)]]

Using the gmx:FileName, editors could upload document for the element using the upload panel :
[[Image(substition-group-otherCitationDetails-upload.png)]]

=== Configuration for gmd:polygon ===
{{{
<field name="gmd:polygon">
  <suggest name="gml:Polygon"/>
</field>
}}}
will only suggest gmd:Polygon to editors. Furthermore, the bounding polygon extent map drawing tools only allows to draw polygons. This will make the editor more consistent.

== Risks ==

== Participants ==
 * Francois