Since these are new questions unrelated to the rest of the thread, it would be best to post it in a new SoPW thread (but please don't re-post now).

pattern for "10/10/2017 11:35 PM" ... '%m/%d/%Y %H:%M %t'

Have a look at the DateTime::Format::Strptime docs - instead of %t you need to use the pattern that matches AM/PM, and instead of %H for 24-hour time you need to use the pattern which matches 12-hour times.

expression formatting ... two different brackets (Glossary) and (100)

Sorry but a single example is not enough to help with a regular expression. For example, can you be sure there will always be exactly two sets of parens in the string? Might there be characters after the second set of parens? Might there even be nested parens? And what strings shouldn't match the regex? Please see How to ask better questions using Test::More and sample data as well as my post here.

Since this question is relatively basic, now might be a good time to review perlrequick and/or perlretut. You might find anchors (like ^ and $) to be useful, but again, that depends on what the various strings you're matching against look like. Also, regex101 can be a useful tool - note that it is not compatible with some of Perl's more advanced features, but for basic things can be very useful.

Minor edits for clarity.

In reply to Re^3: XML data extraction by haukex
in thread XML data extraction by snehit.ar

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