Updated data type documentation and schema constraints to address regex issues

[david-waltermire]

Committer Notes

• Updated Metaschema toolchain to correct schema regex bugs. Resolves Error in datetime-regex #1260.
• Updated data type documentation to be consistent with schemas.

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[aj-stein-nist]

Had to read a few times, test the regexes, and got distracted by xs:restriction and xs:pattern annotations but this looks good. I have a follow-on question I will ask in the discussion board, but it is outside the scope of the PR.

[aj-stein-nist]

The implied question that could or couldn't be a later enhancement I added in #1266.