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Yours is a Frequently Asked Question. The answer to it can be found in the standard Perl documentation by using the command perldoc -q balanced, also known as:

Can I use Perl regular expressions to match balanced text? Although Perl regular expressions are more powerful than "mathematical" regular expressions because they feature conveniences like backreferences ("\1" and its ilk), they still aren't powerful enough--with the possible exception of bizarre and experimental features in the development-track releases of Perl. You still need to use non-regex techniques to parse balanced text, such as the text enclosed between matching parentheses or braces, for example. An elaborate subroutine (for 7-bit ASCII only) to pull out balanced and possibly nested single chars, like "`" and "'", "{"and "}", or "(" and ")" can be found in +es.gz The C::Scan module from CPAN contains such subs for internaluse, but they are undocumented.

Further information can be found in perldoc -q How do I remove HTML which despite the name, is directly applicable to XML.

Helgi Briem
helgi AT decode DOT is

In reply to Re: Balanced delimiter parsing by helgi
in thread Balanced delimiter parsing by moxliukas

Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":

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  • Want more info? How to link or How to display code and escape characters are good places to start.
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