I'd recommend removing it from the ODD as we don't need to define it. It can be included in any XML document by default:
<include xmlns="http://www.w3.org/2001/XInclude" href="path/to/resource.xml"/>
This also includes having fallback text and the like.
The current definition actually modifies <xi:include/> so that it inherits some aspects of the TEI data model (which would be problematic is someone were to avail themselves of it).
I'd recommend removing it from the ODD as we don't need to define it. It can be included in any XML document by default:
<include xmlns="http://www.w3.org/2001/XInclude" href="path/to/resource.xml"/>
This also includes having fallback text and the like.
The current definition actually modifies
<xi:include/>
so that it inherits some aspects of the TEI data model (which would be problematic is someone were to avail themselves of it).