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  2. XPath - Wikipedia

    en.wikipedia.org/wiki/XPath

    XPath (XML Path Language) is an expression language designed to support the query or transformation of XML documents. It was defined by the World Wide Web Consortium (W3C) in 1999, [ 1 ] and can be used to compute values (e.g., strings , numbers, or Boolean values ) from the content of an XML document.

  3. XPath 2.0 - Wikipedia

    en.wikipedia.org/wiki/XPath_2.0

    The location paths of XPath 1.0 are referred to in XPath 2.0 as path expressions. Informally, a path expression is a sequence of steps separated by the " / " operator, for example a/b/c (which is short for child::a/child::b/child::c ).

  4. XPath 3 - Wikipedia

    en.wikipedia.org/wiki/XPath_3

    Compared to XPath 2.0, XPath 3.0 adds the following new features: . Inline function expressions Anonymous functions can be created in an expression context. For example, the expression function ($ a as xs:double, $ b as xs:double) as xs:double {$ a * $ b} creates a function that returns the product of its two arguments.

  5. XML tree - Wikipedia

    en.wikipedia.org/wiki/XML_tree

    XPath, the XML Path Language, is a query language for selecting nodes from an XML document. XPath defines a syntax named XPath expressions that can query an XML document for one or more internal components (elements, attributes, etc.). XPath is widely used in other core-XML specifications and in programming libraries for accessing XML-encoded ...

  6. XQuery - Wikipedia

    en.wikipedia.org/wiki/XQuery

    XQuery contains a superset of XPath expression syntax to address specific parts of an XML document. It supplements this with a SQL-like "FLWOR expression" for performing joins. A FLWOR expression is constructed from the five clauses after which it is named: FOR, LET, WHERE, ORDER BY, RETURN.

  7. Path expression - Wikipedia

    en.wikipedia.org/wiki/Path_expression

    XPath is an example of a path expression language. In concurrency control, path expressions are a mechanism for expressing permitted sequences of execution. For example, a path expression like "{read}, write" might specify that either multiple simultaneous executions of read or a single execution of write but not both are allowed at any point ...

  8. XML - Wikipedia

    en.wikipedia.org/wiki/Xml

    XPath is widely used in other core-XML specifications and in programming libraries for accessing XML-encoded data. XQuery (XML Query) is an XML query language strongly rooted in XPath and XML Schema. It provides methods to access, manipulate and return XML, and is mainly conceived as a query language for XML databases .

  9. JSONPath - Wikipedia

    en.wikipedia.org/wiki/JSONPath

    XPath 3.1 [12] is an expression language that allows the processing of values conforming to the XDM [13] data model. The version 3.1 of XPath supports JSON as well as XML. jq is like sed for JSON data - you can use it to slice and filter and map and transform structured data.