This previous bug:
dealt with some inconsistencies in usage and formatting of "TEI-conformant" and "TEI-conformable", but it did not address the elephant in the room: "TEI-conformable", as it is defined, is meaningless:
"A document is said to be TEI Conformable if it is a well-formed XML document which can be transformed algorithmically and automatically into a TEI Conformant document as defined above without loss of information."
This applies to any XML document. Even extreme cases of documents containing no TEI-like information at all, any information can be represented using e.g. feature structures. I suggest we remove this phrase from the Guidelines, and thus substantially simplify the USE chapter.