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This report describes the second GML prototype for the Dutch TOP10NL topographic data 1:10,000.The prototype was built by the TU Delft, section GIS-Technology as part of a larger project 'Object Orientation TOP10Vector', that was started in 2000 by the Dutch Topographic Service (TDN).The report opens with some background information about the TOP10Vector project.It then gives an overview of the changes with reference to the first GML prototype (published in 2001).These changes were the result of discussions with the other participants in the project: ITC Enschede, CGI Wageningen and the Topographic Service itself.The report describes implications of changes in the data model for the conversion process (from MicroStation Design files via FME and Oracle Spatial to GML).It then discusses the main characteristics of the second GML prototype, with a focus on the choices that were made in implementing the data model.Some of these choices may need reconsideration (e.g.mixed geometries).The report concludes with an overview of issues that are still open and also points at the new version of GML (GML 3.0), which offers a number of new possibilities (metadata, temporal aspects, more geometry types, use of topology).The prototype consists of test datasets plus two application schemas, one for the data itself and one for the metadata.These two application schemas (.xsd documents) are included in an appendix.Other more technical information related to the production of the test datasets and the conversion into GML can be found in a separate document (Part 2 of this publication).The test datasets can be obtained from the following site: http://kartoweb.itc.
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