does this take us back to conformance?
TEI P5 out of the box expects you to use W3C datatypes for
machine-readable dates, for good or bad. This means that others
can parse your XML with a well-understood set of expectations. If you
need to change the datatype for date/@value
to use some other scheme, for your project, you could make an ODD file
(or whatever), where you expressed
your degree of divergence from the out-of-the-box, and your intent.
That said, I bet software for doing every conceivable date
transformation is widely available....
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