Hi, another small proposed change: Index: src/lxml/objectify.pyx =================================================================== --- src/lxml/objectify.pyx (revision 44363) +++ src/lxml/objectify.pyx (working copy) @@ -759,7 +759,7 @@ return self.__nonzero__() def __checkBool(s): - if s != 'true' and s != 'false': + if s != 'true' and s != 'false' and s != '1' and s != '0': raise ValueError cdef object _strValueOf(obj): Otherwise, annotate(<elt>, ignore_old=False) will revert a correctly pre-annotated boolean element with a text value of "0" and "1", which XML Schema datatypes allows, to py:pytype="int". It still does this for ignore_old=True which is the default. Holger -- Psssst! Schon vom neuen GMX MultiMessenger gehört? Der kanns mit allen: http://www.gmx.net/de/go/multimessenger