What special characters are available for use with rex and regex and what are their functions?

[satya2p]

I see a variety of letters being used like w,n,d,s etc. pls help me to understand what characters are available to use and what these characters stand for in these queries.

rex field=_raw=AnyKeyord "(?*w+)"
rex field=_raw=AnyKeyord "(?**n+)"
regex AnyKeyord=\d+*
regex AnyKeyord=\n+

[dwaddle]

man pcrepattern

[rlough]

Do you have a specific task you're trying to achieve?

[alacercogitatus]

Surely, me thought upon sitting to review the site of answers from Splunktonia, Surely this question would be answered? But nay, none dare tackle the daunting task of defining regex. But hark! A hero, in the distance! Although he be of simple stature, and average girth, he brought much knowledge and wisdom. He therefore sayeth: Yon @satya2p, hereupon receiving these words of written ideas, perhaps you should navigate towards the aforementioned site of destiny! http://www.regular-expressions.info/tutorial.html This "tutorial" gives many ideas and explanations that shall explain the nature of a regex and what "w", "n" and the like express! Enjoy thusly!

[KindaWorking]

Just to follow on from the witty alacercogitatus. Another tutorial I found very handy is:
http://regexone.com/

As for testing that your regex expression is correct, check out:
https://regex101.com/

The second link I gave you I still use to this day and will continue to use it no matter how proficient I get with regex.

[ppablo · Accepted solution]

Hi @satya2p

Have you taken a look at the Splunk documentation on regular expressions? It also covers the different character types:
http://docs.splunk.com/Documentation/Splunk/6.2.1/Knowledge/AboutSplunkregularexpressions