I'm doing a first pass through the TEI Guidelines 3.11, using a table to organize original sections, modified sections, and notes, as part of the ad-hoc committee work. Today I added a bug report to the SourceForge system (asking for monogr and analytic to be added to the content model of bibl, as the guidelines suggest they should be available there), and got about 18 pages of the revision document done. Long, slow, painful task.