Not performing language fixup

[dmj]

When a Schematron A with the default language of a includes an external Schematron definition from a document with a default language b, the inclusion step overrides the default language of the included Schematron definition.
E.g.

<schema xmlns="http://purl.oclc.org/dsdl/schematron" xml:lang="en">
  <include href="B.sch#include-me"/>
  ...
</schema>

and

<schema xmlns="http://purl.oclc.org/dsdl/schematron" xml:lang="de">
  <pattern id="include-me">
    ...
  </pattern>
</schema>

will result in a combined Schematron

<schema xmlns="http://purl.oclc.org/dsdl/schematron" xml:lang="en">
  <pattern>
  ...
  </pattern>
  ...
</schema>

Note:

• With include/@href and extends/@href this only happens when using a fragment identifier with a local reference.
• This is also a problem with abstract rules (the language of the assertions/reports)
• This is also a problem with abstract patterns (does a instance inherit the language of an abstract pattern?)