How to fix validation issues:
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If you are experiencing issues validating the DDML schema, please check the following:

1.) Have you downloaded the necessary external schemas and copied them to the /external directory?  Please see the README.txt file in /external for instructions.

2.) Are you using XMLSpy and getting duplicate declaration errors from the XLink schema?  Try replacing the CoreCatalog.xml.  See the README.txt file in /external for more information.



Changes in 106-15:
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-Updated to import MathML 3.0 schema.