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Geography Markup Language
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===Moving to XML Schema – Version 2.=== Even before the passage of the Recommendation Paper at the OGC, Galdos had started work on an [[XML Schema (W3C)|XML Schema]] version of GML, replacing the rdf:resource scheme for remote references with the use of xlink:href, and developing specific patterns (e.g. Barbarians at the Gate) for handling extensions for complex structures like feature collections. Much of the XML Schema design work was done by Mr. Richard Martell of Galdos who served as the document editor and who was mainly responsible for the translation of the basic GML model into an XML Schema. Other important inputs in this time frame came from Simon Cox (CSIRO Australia), Paul Daisey (US Census), David Burggraf (Galdos), and Adrian Cuthbert (Laser-Scan). The US Army Corps of Engineers (particularly Jeff Harrison) were quite supportive of the development of GML. The US Army Corps of Engineers sponsored the “USL Pilot” project, which was very helpful in exploring the utility of linking and styling concepts in the GML specification, with important work being done by Monie (Ionic) and Xia Li (Galdos). The XML Schema specification draft was submitted by Galdos and was approved for public distribution in December 2000. It became a Recommendation Paper in February 2001 and an Adopted Specification in May of the same year. This version (V2.0) eliminated the “profiles” from version 1. and established the key principles, as outlined in the original Galdos submission, as the basis of GML.
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