Xml schema validating parser
This is extensive, has several obscure features, which, although supported by XML/Ada, are of little use in most pratical uses.
If I'm doing it right then there shouldn't be a single line of code that isn't directly related to passing a test.
The following elements are supported by the XML Schema parser.
If you don't see an element or an attribute here then you definitely can't use it in a schema document.
You can expect that the schema document parser will produce an error if you include elements which are not supported.
However, unsupported attributes may be silently ignored.
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This module represents my attempt to support enough XML Schema syntax to be useful without attempting to tackle the full standard.