xpathDate - support StandardisedAnswersPart.
Support xml:space in shares strings table.
This was missing from the XSD; but its absence causes files Excel can't
open!
As obtained from ECMA, though renamed
Update SML to ECMA 376 4ed transitional
(with support for xml:space in Shared Strings part)
Add license headers
EditEmbeddedCharts - bug fixes