Per our deprecation, I've removed <altIdentitier> as a child of <msPart> and <idno> as a child of <biblStruct>. (The latter 9 days early. Sue me.)

WARNING: use of deprecated method — the use of the altIdentifier element as a direct child of the msPart element will be removed from the TEI on 2016-09-09

WARNING: use of deprecated method — the use of the idno element as a direct child of the biblStruct element will be removed from the TEI on 2016-09-18