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Subject: Re: [egov] Tactics on data alignment / standardization
Farrukh - Yes, there has been considerable discussion of schema registries by OGC members and staff. Let me explore this issue a bit more and provide some more information. Kind regards Carl ----- Original Message ----- From: Farrukh Najmi <farrukh.najmi@sun.com> To: Eliot Christian <echristi@usgs.gov> Cc: Thomas Lee <ytlee@cecid.hku.hk>; <egov@lists.oasis-open.org>; Carl Reed <creed@opengis.org>; Joe Chiusano <chiusano_joseph@bah.com> Sent: Thursday, July 24, 2003 5:43 AM Subject: Re: [egov] Tactics on data alignment / standardization > Eliot Christian wrote: > > > At 09:46 PM 7/23/2003 -0400, David RR Webber wrote: > > > >> Carl, > >> > >> On quick inspection you deserve an award for the most complex > >> XML application I have seen, and also for using the most > >> complex parts of the W3C specifications. > > > > > > To me, it seems the GML approach is to use XML Schema as a tool for > > representing semantic relationships as well as data type syntax. So, > > a "polygon" is not merely defined in terms of its syntax as a set of > > coordinate pairs, but it is derived from a chain of abstract types > > that mark higher levels of geometric abstraction. That's not wrong > > in itself, expect that it makes the whole structure fiendishly > > difficult to handle and very obtuse to understand. IMHO, GML > > could employ a simple XML Schema type system supplemented by > > an ISO 11179 semantic register. > > The idea of leveraging a registry (I assume you meant "semantic > registry" in above statement) to handle some of the complexity makes > good sense. ebXML Registry standard is based upon ISO 11179 specification. > > What may be a similar example is that the OpenGIS consortium <http://www.opengis.org> has been using the ebXML Registry Information Model specification for more than a year now to implement catalogue services for the geospatial domain > > Could Eliot or Carl look into the state of that work and determine > whether a similar approach could be employed for managing GML data. You > may contact Richard Martell mailto:rmartell@galdosinc.com for more > information. > > -- > Farrukh > >
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