mbeckerle commented on pull request #421: URL: https://github.com/apache/incubator-daffodil/pull/421#issuecomment-700235890
This XSD for DFDL is used by Daffodil when it takes in a schema, to validate that it does not use any of the XSD features that are not in the DFDL subset of XSD. This was done by just commenting out specific lines of the original schema which is the w3c's XML Schema for XML Schema. That is, we didn't write this schema ultimately, we just adapted it. XML Schema is itself an XML-embedded language (for better or worse), so it's possible to write an XML Schema for it, but that's a meta-circular exercise that was tripping up XML validation in IDEs working with DFDL schemas. There is no-doubt other "dead code" in this schema. I think the goal is to continue to be able to diff this XML Schema for DFDL against the XML Schema for XML Schema so that if XML Schema evolves, we can identify and isolate the differences. I think this schema does not enforce everything about the subset. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: [email protected]
