Hi,
I thought the XML Schema regex limitations were not applicable to XSL-T regex's.
Cheers,
Bryan Rasmussen
On 4/16/07, Abel Braaksma <abel(_dot_)online(_at_)xs4all(_dot_)nl> wrote:
bryan rasmussen wrote:
> Is there a concise description somewhere as to how they differ, are
> there a large number of xslt regular expressions that are compatible
> with Java regular expressions or are they basically incompatible? I
> would suppose the main difference is that XSL-T regular expressions
> are Unicode compatible regex's - correct?
>
I don't suppose there is such an overview. Some flavors are explained in
Jeffrey Friedl's famous book and some are (briefly) explained here:
http://regular-expressions.info. But they don't explain W3's favorite
flavor (which is to a large part one-way compatible with Perl's flavor).
You could check and compare the following:
XSLT / XPath regexes: http://www.w3.org/TR/xmlschema-2/#regexs and
http://www.w3.org/TR/xpath-functions/#regex-syntax
Java regexes:
http://java.sun.com/j2se/1.5.0/docs/api/java/util/regex/Pattern.html
The most obvious differences in syntax I found are the Java specific
constructs, which are not covered in W3's flavor, like \p{javaLower}
etc., possessive quantifiers, Quotation (\Q - \E), end/start of text (\A
and \Z) and all special constructs (there is no look-ahead/look-behind,
non-capturing parentheses, flags on/of in a group etc).
Cheers,
-- Abel Braaksma
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