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From: Richard Owlett <rowlett@access.net>
Newsgroups: comp.editors
Subject: Re: Automating an atypical search & replace
Date: Sun, 14 Jul 2024 02:47:02 -0500
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On 07/13/2024 06:39 PM, Lawrence D'Oliveiro wrote:
> On Sat, 13 Jul 2024 11:08:48 -0500, Richard Owlett wrote:
> 
>> These occurrences are consistently of the form
>>      <span class='add'>arbitrary_text</span>
>>
>> I wish to delete "<span class='add'>" and *ASSOCIATED* "</span>".
> 
> This is beyond the abilities of regular expressions. This is the point
> where you need to use an actual HTML/XML-parsing library.
> 
> See also
> <https://stackoverflow.com/questions/1732348/regex-match-open-tags-except-xhtml-self-contained-tags>.
> 

Thank you for the reference. Also I've begun perusing 
https://docs.kde.org/stable5/en/kate/katepart/regular-expressions.html .
One of my motivations for this project is education.