You can apply quantifiers to and use alternation within enclosed groups.Ĭharacters enclosed in square brackets. Groups can define character classes, repetition matches, named capture groups, modular regular expressions, and more. ![]() Regular expressions allow groupings indicated by the type of bracket used to enclose the regular expression characters. The metacharacters that define the pattern that Splunk software uses to match against the literal. The exact text of characters to match using a regular expression. Regular expressions terminology and syntax Term ![]() However, the Splunk platform does not currently allow access to functions specific to PCRE2, such as key substitution. The Splunk platform includes the license for PCRE2, an improved version of PCRE. Splunk regular expressions are PCRE (Perl Compatible Regular Expressions) and use the PCRE C library. Search commands that use regular expressions include rex and regex and evaluation functions such as match and replace. You also use regular expressions when you define custom field extractions, filter events, route data, and correlate searches. Regular expressions match patterns of characters in text and are used for extracting default fields, recognizing binary file types, and automatic assignation of source types. For a discussion of regular expression syntax and usage, see an online resource such as or a manual on the subject. You are welcome to skip ahead to the next section if you're using a different language.This primer helps you create valid regular expressions. Our only major dependency, binaryen, has a simple C API. The concepts are highly portable, soįeel free to use the environment you're most comfortable with. In this guide, we will be using TypeScript and NodeJS.
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