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1Regular expressions cannot handle "matching parentheses" -- they are mathematically incapable of it.glenn jackman– glenn jackman2014-09-25 21:20:05 +00:00Commented Sep 25, 2014 at 21:20
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I don't think that is the case, because I have extracted the lines above with "[...]". Plus, I am not looking to match the parens, just aggressive match and skip that blank line after. If this absolutely not possible with sed what alternatives do you suggest?knk– knk2014-09-25 21:23:58 +00:00Commented Sep 25, 2014 at 21:23
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Are the opening and closing parens alone on their own lines like you show here?glenn jackman– glenn jackman2014-09-25 21:26:31 +00:00Commented Sep 25, 2014 at 21:26
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Pretty much, its like "(ROOT" and "(. .)))". This is a sentence parsed using the stanford parser. If I can write one for the simpler case I can modify it for the specific case.knk– knk2014-09-25 21:29:31 +00:00Commented Sep 25, 2014 at 21:29
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@glennjackman There is a complication - things like perl regular expresions etc are not regular expressions in the mathematical sense; They can do much more. In most cases your point is true anyway - it's just not that easy to tell.Volker Siegel– Volker Siegel2014-09-26 06:10:14 +00:00Commented Sep 26, 2014 at 6:10
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