XPath - Query language

XPath is a query language created in 1999.

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25Years Old

XPath (XML Path Language) is a query language for selecting nodes from an XML document. In addition, XPath may be used to compute values (e.g., strings, numbers, or Boolean values) from the content of an XML document. XPath was defined by the World Wide Web Consortium (W3C).. Read more on Wikipedia...

Tags: queryLanguage
Early development of XPath happened in W3C
ANTLR grammar for XPath
See also: (20 related languages) XML, CSS, Java, C#, Python, JavaScript, XProc, XQuery, JSON, Unicode, C, Free Pascal, Perl, PHP, Ruby, Scheme, SQL, MySQL, PostgreSQL, Tcl

Example from Wikipedia:

/Wikimedia/projects/project[@name='Wikipedia']/editions/edition/text()