migration from ISO usage of xsd for xlink 1999

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migration from ISO usage of xsd for xlink 1999

Wilson, MD (Michael)
migration from ISO usage of xsd for xlink 1999

ISO/TC 211 Geographic Information/Geomatics [1] has published the standard ISO 19139 Geographic information -- Metadata -- XML schema implementation [2] which informatively references the XML schema [3] which in turn calls an OGC schema [4] for the W3C xlink 1999 namespace [5] because there was no XML schema published for the 1999 version of xlink.

Ive not checked the differences between the two schemata which refer to the same namespace[5], but, you may wish to liaise with OGC or ISO to update this link in step with your developments in order to improve adoption of your new work. If not you may find that any incompatibilities between the informative OGC schema and your informative schema may cause delays to the adoption of your schema.

[1] http://www.isotc211.org/

[2] http://www.iso.org/iso/iso_catalogue/catalogue_tc/catalogue_detail.htm?csnumber=32557&commid=54904

[3] http://standards.iso.org/ittf/PubliclyAvailableStandards/ISO_19139_Schemas/gco/basicTypes.xsd

[4] http://schemas.opengis.net/xlink/1.0.0/xlinks.xsd

[5] http://www.w3.org/1999/xlink

Michael Wilson

Manager, W3C Office in the UK & Ireland

STFC Rutherford Appleton Laboratory, UK


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Re: migration from ISO usage of xsd for xlink 1999

Henry S. Thompson
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Thanks for your input -- the current draft candidate for inclusion in
the final version of XLink 1.1 is available at


You will note that this does have attribute groups defined (as well as
model groups and complex types), but does not use the same names that
the opengis schema uses.

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       Henry S. Thompson, School of Informatics, University of Edinburgh
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