[SIS-154] Allow references to multi-lingual metadata resources

• Type: Improvement
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Affects Version/s: 0.3
• Component/s: Metadata
• Assignee: Unassigned
• Reporter: Martin Desruisseaux
• Created: 17/Dec/13 01:11
• Updated: 17/Dec/13 01:11

Description

Files on http://schemas.opengis.net/iso/19139/20070417/resources/Codelist/ are provided in two versions: gmxCodelists.xml and ML_gmxCodelists.xml where "ML" stands for "multilingual". Apache SIS writes references to those files when marshalling a org.opengis.util.CodeList or some other objects like java.util.Locale. The files are selected as below:

• SIS 0.3 uses a hard-coded mix of the two versions.
• SIS 0.4 consolidated all code lists to the unlocalized versions for now, for the reason explained below.

We assume that the following assumptions hold:

• All code lists defined in a ML_gmxCodelists.xml file exist also in gmxCodelists.xml.
• The converse of above point is not necessarily true: the ML_gmxCodelists.xml file may contain only a subset of gmxCodelists.xml.
• All English descriptions in ML_gmxCodelists.xml file are strictly identical to the ones in gmxCodelists.xml.
• Descriptions in other languages than English exist only in ML_gmxCodelists.xml.

We presume that the same assumptions hold also for the resources/uom/gmxUom.xml file and its localized variant.

Problem is that the multilingual variant does not contain all code list defined in the unlocalized variant. Consequently is we wanted to marshal a valid document, strictly speaking we should probably take in account which code lists are internationalized and which one are not. As of Apache SIS 0.4, we avoid this problem for now be referencing only the unlocalized variant.

We may want to reference multilingual files in some circumstance in a future SIS version, maybe depending on user's locale. This issue is for tracking such potential need.