XML Schema to validate XML Schemas?

Question

Does anyone know if its possible to validate an XML schema with another XML schema? If so, is there a reference implementation out there? I would like to parse a Schema doc using JAXB.

Answer 1

Of course. Most of the time you can just point your browser to the URL that serves as the namespace for the XML document. This also works with XML Schema: http://www.w3.org/2001/XMLSchema

The XSD is linked from there.

Answer 2

Also check XSOM. This is what JAXB RI uses to load and process XSDs.

Answer 3

There are two versions of the XML Schema Definition Language (XSD): 1.0 and 1.1. Version 1.0 was released in 2001 and version 1.1 was released in 2009.

The normative XSD schemas are:

• http://www.w3.org/2001/XMLSchema.xsd
• http://www.w3.org/2009/XMLSchema/XMLSchema.xsd

You can test the validation of an XSD schema via the command line, e.g.:

$ xmllint -noout -schema XMLSchema.xsd myschema.xsd