/(^IST.{6}).*(?:\n(?!^IST)|.)*(^335794.*)/m

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Find a line starting with IST, then either a \n not followed by IST or other characters, then your line number. Tweak the captures

A solution based around a HTML/XML parser might be better. You may even be able to use an xpath query to get what you want

In reply to Re: Regex :: Line Traversal by bsb
in thread Regex :: Line Traversal by Anonymous Monk

Title:
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