XSLT 2.0 and XPath 2.0 Programmer's Reference, 4th Edition (652 page)

BOOK: XSLT 2.0 and XPath 2.0 Programmer's Reference, 4th Edition

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Character Ranges

A
character range
(which is always part of a
character group
) defines a set of permitted characters that contains either a single character or a range of characters occupying adjacent Unicode codepoints.

If you are comparing these rules with the ones in XML Schema Part 2, be sure to look at the second edition; the original XML Schema Recommendation got this syntax badly wrong. In fact, there are still a couple of errors in the second edition.

Construct	Syntax
charRange	codepointRange \| XmlCharIncDash
codepointRange	charOrEsc - charOrEsc
charOrEsc	XmlChar \| SingleCharEsc
XmlChar	Any XML character except [ ] \ -
XmlCharIncDash	Any XML character except [ ] \