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The XPath syntax is designed to mimic URI (Uniform Resource Identifier) and Unix-style file path syntax. More complex expressions can be constructed by specifying an axis other than the default 'child' axis, a node test other than a simple name, or predicates, which can be written in square brackets after any step.
libxslt is the XSLT C library developed for the GNOME project. It provides an implementation of XSLT 1.0, plus most of the EXSLT set of processor-portable extensions functions and some of Saxon's evaluate and expressions extensions. libxslt is based on libxml2, which it uses for XML parsing, tree manipulation and XPath support.
AutoPilot is a class containing functions that perform node-level iteration and XPath. XMLModifier is a class that offers incremental update capability, such as delete, insert and update. The extended VTD-XML consists of the following classes:
XSLT 3.0 will work with either XPath 3.0 or 3.1. In the case of 1.0 and 2.0, the XSLT and XPath specifications were published on the same date. With 3.0, however, they were no longer synchronized; XPath 3.0 became a Recommendation in April 2014, followed by XPath 3.1 in February 2017; XSLT 3.0 followed in June 2017.
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.
XPath (or XPath 1.0): an expression language for addressing portions of an XML document; XPath 2.0: a language for addressing portions of XML documents, successor of XPath 1.0; XPointer: a system for addressing components of XML based internet media; XProc : a W3C standard language to describe XML Pipeline
XPointer is a system for addressing components of XML-based Internet media. It is divided among four specifications: a "framework" that forms the basis for identifying XML fragments, a positional element addressing scheme, a scheme for namespaces, and a scheme for XPath-based addressing.
SXML is an alternative syntax for writing XML data (more precisely, XML Infosets [1]) as S-expressions, to facilitate working with XML data in Lisp and Scheme.An associated suite of tools [which?] implements XPath, SAX and XSLT for SXML in Scheme [2] [3] and are available in the GNU Guile implementation of that language.