About: Regular expression

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A regular expression (shortened as regex or regexp; also referred to as rational expression) is a sequence of characters that specifies a search pattern in text. Usually such patterns are used by string-searching algorithms for "find" or "find and replace" operations on strings, or for input validation. It is a technique developed in theoretical computer science and formal language theory.

Attributes	Values
rdf:type	Thing music genre
rdfs:label	Regular expression (en)
rdfs:comment	A regular expression (shortened as regex or regexp; also referred to as rational expression) is a sequence of characters that specifies a search pattern in text. Usually such patterns are used by string-searching algorithms for "find" or "find and replace" operations on strings, or for input validation. It is a technique developed in theoretical computer science and formal language theory. (en)
rdfs:seeAlso	Perl Compatible Regular Expressions
sameAs	Regular expression Regular expression Regular expression Regular expression
dbp:wikiPageUsesTemplate	dbt:! dbt:Anchor dbt:Authority_control dbt:Citation_needed dbt:Cite_book dbt:Cite_conference dbt:Cite_document dbt:Cite_journal dbt:Cite_web dbt:Code dbt:Commons_category-inline dbt:Curlie dbt:Em dbt:Main dbt:Mono dbt:Quote dbt:Redirect dbt:Refbegin dbt:Refend dbt:Reflist dbt:See_also dbt:Sfn dbt:Short_description dbt:Slink dbt:Tmath dbt:Visible_anchor dbt:Wikibooks dbt:Wiktionary dbt:Sxhl dbt:Strings dbt:Formal_languages_and_grammars dbt:Lookbehind
Subject	1951 introductions Articles with example code Automata (computation) Pattern matching Programming constructs Regular expressions Formal languages
gold:hypernym	Sequence
prov:wasDerivedFrom	http://en.wikipedia.org/wiki/Regular_expression?oldid=1073271319&ns=0
Wikipage page ID	25717 (xsd:integer)
page length (characters) of wiki page	96263 (xsd:nonNegativeInteger)
Wikipage revision ID	1073271319 (xsd:integer)
has abstract	A regular expression (shortened as regex or regexp; also referred to as rational expression) is a sequence of characters that specifies a search pattern in text. Usually such patterns are used by string-searching algorithms for "find" or "find and replace" operations on strings, or for input validation. It is a technique developed in theoretical computer science and formal language theory. The concept of regular expressions began in the 1950s, when the American mathematician Stephen Cole Kleene formalized the description of a regular language. They came into common use with Unix text-processing utilities. Different syntaxes for writing regular expressions have existed since the 1980s, one being the POSIX standard and another, widely used, being the Perl syntax. Regular expressions are used in search engines, search and replace dialogs of word processors and text editors, in text processing utilities such as sed and AWK and in lexical analysis. Many programming languages provide regex capabilities either built-in or via libraries, as it has uses in many situations. (en)
foaf:isPrimaryTopicOf	http://en.wikipedia.org/wiki/Regular_expression
is rdfs:seeAlso of	Delimiter Pattern matching
is Wikipage redirect of	Search-and-replace =~ Backreference Basic regular expression Generalized regular expression Global search and replace POSIX regular expression Search and Replace Complement operator (regular expressions) Find & replace Find and replace Perl regex Extended regular expression .* .*? Reg-ex RegExp Reg (online slang) Reg exp Regexen Regexes Regexp Regexps Regx Regxp ReGex RegEx Regex Regular Expression Regular Expressions Regular expression examples Regular expressions Simple regular expression Find and Replace Rgex Irregular expression Irregular expressions Two problems
is Link from a Wikipage to another Wikipage of	Flex (lexical analyser generator) Floyd–Warshall algorithm Form (HTML) Formal grammar Formal language

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