[xsd-users] GML extending, How-to?

[Edgar Szilagyi]

Hi!

First of all, thanks for Boris Kolpackov, who quickly answered my Hello 
World question. Sorry about my wrong english.

I'm working in research group at University of São Paulo. We have 
developed many simulation software for big companies in Brazil.
Now we are revising file format for information interchange and adopting 
XML and Code Synthesis due it's high quality. Thanks very much for all 
developers!

Well, that's the question: We want to extend GML(Geographic Markup 
Language). But, how can we do it? A GML has a completly defined schema, 
with gml::featureCollection as root element. When we parse a GML valid 
file, all we get is a AbstractFeatureType. But we need a specialized 
instance: railRoad. How can we put these two things (GML schema and our 
specialization below) together?


This is a schema sample:

<complexType name="railRoad">
<complexContent>
<extension base="gml:AbstractFeatureType">
<sequence>
<element name="railName" type="string"/>
<element name="mark" minOccurs="0" maxOccurs="unbounded">
</sequence>
</complexContent>
</complexType>

Can anyone help us? Thanks very much!

Edgar Szilagyi