XSD Name/String character validation missing

[kinglevel]

Problem

The XSD nametype and xs:string types do not restrict which characters
are valid in element names and string values. GDTF-Share enforces a
character whitelist on ChannelSet names (and likely other Name fields) that
is not documented in the XSD:

" %=*+-<>_/:'`0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz@#()";

Notably absent: . (dot/period), !, ?, ^, ~, {, }, [, ],
|, \, and non-ASCII characters.

Symptoms

The GDTF-Share fixture builder highlights ChannelSet rows in red when names
contain invalid characters (e.g. Rotate 1..100% has dots). The file can
still be saved but may cause issues in downstream tools.

Affected names (examples)

Original (from MA2)	Issue	Sanitized
Rotate 1..100%	. invalid	Rotate 1 100%
Rotate -100..-1%	. invalid	Rotate -100 -1%
Cycle 1..100%	. invalid	Cycle 1 100%

Resolution

The XSD nametype should include a xs:pattern restriction matching the
GDTF-Share character whitelist, so validators can catch these before upload.

Discovered 2026-03-18.

[petrvanekrobe]

Thank you. The XSD is mostly community maintained, feel free to provide a PR, thank you.