Re: Regular Expressions in XPath 2.0

Don't know if this is close or very different from the XPath 2.0
regexs, but this seems like an extensive tutorial:

--
Cheers,
Dimitre Novatchev
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Truly great madness cannot be achieved without significant intelligence.
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To invent, you need a good imagination and a pile of junk
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You've achieved success in your field when you don't know whether what
you're doing is work or play

I guess XPath is not off-topic to this list, if it is then I'm sorry
about this post.

I have just started learning the 2.0 versions of XSLT and XPath and
recently learned that Regular Expressions were introduced in XPath 2.0
and were not in XPath1.0.

I would like understand a few things about the Regular Expressions in
XPath 2.0.

According to the slide here:
http://www.mulberrytech.com/papers/XPath-2-0-User-Grp-HTML/slide060.html
the regular expressions in XPath are taken from Perl.

I've studied Regular Expressions in school a long time ago, but I've
never learned Perl.

I have a few questions

1) Are regular expressions in XPath 2.0 identical or are they similar
to those in Perl?

2) What would be the best approach to re-learn Regular Expressions
with respect to XPath 2.0, I know I have to first re-learn the basics
of regular expressions too.

I think there's a standard for Regular Expressions and each
programming language specializes or deviates from the standard.

Thank you for your input.

-Rashmi