<<O>>  Difference Topic RegularExpression (r1.4 - 22 Mar 2003 - PeterThoeny)

Regular Expressions

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Introduction

Regular expressions (REs), unlike simple queries, allow you to search for text which matches a particular pattern.

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[^0-9a-zA-Z] Matches any symbol (but not a number or a letter)
[A-Z][A-Z]* Matches one or more uppercase letters
[0-9]{3}-[0-9]{2}-[0-9]{4} US social security number, e.g. 123-45-6789
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PNG;Chart Search for topics containing the words PNG and Chart. This is not a regular expression! But a useful facility that is enabled when regular expression searching is enabled.
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PNG;Chart Search for topics containing the words PNG and Chart. The ";" and separator is TWiki-specific and is not a regular expression; it is a useful facility that is enabled when regular expression searching is enabled.

Searches with "and" combinations

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Revision r1.3 - 23 Nov 2002 - 05:52 - PeterThoeny
Revision r1.4 - 22 Mar 2003 - 05:12 - PeterThoeny