xsl:analyze-string element is new in XSLT 2.0. It applies a regular expression to
a supplied string value. The string is split into a sequence of substrings, each of which is
classified as either a matching substring (if it matches the regular expression) or a non-matching
substring (if it doesn't). The substrings are then processed individually: the matching substrings by
xsl:matching-substring element that appears as a child of the
instruction, the non-matching substrings by a similar
If either of these is omitted, the relevant substrings are not processed.
The element has three attributes:
select is an XPath expression whose value is the string
to be analyzed;
regex is the regular expression (which may be given as an attribute value
flags provides one or more Perl-like flags to control the way in which
regular expression matching is performed, for example the value "m" indicates multi-line mode.
When processing matching substrings, it is possible to call the
to find the parts of the matching substring that matched particular parenthesized groups within the
There are examples of this element in the XSLT 2.0 Recommendation.
XSLT 3.0 is proposing to remove the restriction that the regular expression must not be one that matches a zero-length string. Saxon 9.5 still has this restriction.