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Section 2.1 : Discussion of the tutorial use

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This chapter presents the technologies and the tools for WFS client and server development. WFS standard, version 2.0, is directly referenced to the corresponding "WFS requests" specification sections (GetCapabilities, DescribeFeature, GetFeature, etc) regarding the information needed when implementing the WFS interface.

Furthermore, this chapter also explains how to work with GML, and the concept of a GML application schema. It also shows you how to design your feature types by using UML class modeling, and how to convert it automatically to a GML application schema by using ShapeChange application (a java application that takes a UML model in XMI and converts it to a GML application schema).

This tutorial provides the necessary information for a data provider to publish its vector data though a WFS server. Some examples, illustrated with real data, are presented in a step by step description with open source and proprietary server technologies. Hopefully, these examples can be easily adapted to the provider data particularities. In addition, this tutorial presents some information regarding the WFS standard and its operation. This is illustrated with examples, which can be used by a technology developer as an easy way to have a first contact with a particular specification, before reading the hard details of the standard document itself. It is also thought to be used by teachers that want to present the WFS standard to their pupils using existing examples. A WFS user is supposed to access the data, to download the data, and to use visualization tools, some examples of these practices can also be seen here.

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