Search results
Results From The WOW.Com Content Network
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.
XML namespaces are used for providing uniquely named elements and attributes in an XML document. They are defined in a W3C recommendation . [ 1 ] [ 2 ] An XML instance may contain element or attribute names from more than one XML vocabulary.
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.
XML documents have a hierarchical structure and can conceptually be interpreted as a tree structure, called an XML tree. XML documents must contain a root element (one that is the parent of all other elements). All elements in an XML document can contain sub elements, text and attributes.
Failure to do so would give rise to a naming collision on the title element (as well as any other elements that shared this unintended similarity). In the preceding example, there is enough information in the structure of the document itself (which is specified by the "root" element) to provide a means of unambiguously resolving element names.
A QName, or qualified name, is the fully qualified name of an element, attribute, or identifier in an XML document. A QName concisely associates the URI of an XML namespace with the local name of an element, attribute, or identifier in that namespace. [1] To make this association, the QName assigns the local name a prefix that corresponds to ...
The element's contents follow, which are either elements themselves or strings. There is no special syntax required for XML attributes. In SXML they are simply represented as just another node, which has the special name of @. This can't cause a name clash with an actual "@" tag, because @ is not allowed as a tag name in XML. This is a common ...
Although XML Namespaces are not part of the XML specification itself, virtually all XML software also supports XML Namespaces. XML Base defines the xml:base attribute, which may be used to set the base for resolution of relative URI references within the scope of a single XML element. XML Information Set or XML Infoset is an abstract data model ...