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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. For example, the expression
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 2.0 is a version of the XPath language defined by the World Wide Web Consortium, W3C. It became a recommendation on 23 January 2007. [1] As a W3C Recommendation it was superseded by XPath 3.0 on 10 April 2014. XPath is used primarily for selecting parts of an XML document. For this purpose the XML document is modelled as a tree of nodes.
The World Wide Web Consortium's XML 1.0 Specification [3] of 1998 [4] and several other related specifications [5] —all of them free open standards—define XML. [6] The design goals of XML emphasize simplicity, generality, and usability across the Internet. [7] It is a textual data format with strong support via Unicode for different human ...
XQuery is a functional, side effect-free, expression-oriented programming language with a simple type system, summed up by Kilpeläinen: [8] All XQuery expressions operate on sequences, and evaluate to sequences. Sequences are ordered lists of items.
XQJ Tutorial; Building Bridges from Java to XQuery, Charles Foster. XML Prague 2012 (Prezi Presentation) Java Integration of XQuery, Hans-Jürgen Rennau. Balisage 2010; Orbeon Forms using XQJ; Spring Integration XQuery Support; XQS: XQuery for Scala (Sits on top of XQJ) IntelliJ XQuery Support plugin
The syntax of JavaScript is the set of rules that define a correctly structured JavaScript program. The examples below make use of the log function of the console object present in most browsers for standard text output .
The webpage can be modified by JavaScript to dynamically display (and allow the user to interact with) the new information. The built-in XMLHttpRequest object is used to execute Ajax on webpages, allowing websites to load content onto the screen without refreshing the page. Ajax is not a new technology, nor is it a new language.