Glossary of "XML Path Language (XPath) 2.0"

Term entries in the "XML Path Language (XPath) 2.0" glossary

W3C Glossaries

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atomic value

From XML Path Language (XPath) 2.0 (2007-01-23)

An atomic value is a value in the value space of an atomic type, as defined in .

atomization

From XML Path Language (XPath) 2.0 (2007-01-23)

Atomization of a sequence is defined as the result of invoking the fn:data function on the sequence, as defined in .

available collections.

From XML Path Language (XPath) 2.0 (2007-01-23)

Available collections. This is a mapping of strings onto sequences of nodes. The string represents the absolute URI of a resource. The sequence of nodes represents the result of the fn:collection function when that URI is supplied as the argument.

available documents.

From XML Path Language (XPath) 2.0 (2007-01-23)

Available documents. This is a mapping of strings onto document nodes. The string represents the absolute URI of a resource. The document node is the root of a tree that represents that resource using the data model. The document node is returned by the fn:doc function when applied to that URI.

axis step

From XML Path Language (XPath) 2.0 (2007-01-23)

An axis step returns a sequence of nodes that are reachable from the context node via a specified axis. Such a step has two parts: an axis, which defines the "direction of movement" for the step, and a node test, which selects nodes based on their kind, name, and/or type annotation.

base URI.

From XML Path Language (XPath) 2.0 (2007-01-23)

Base URI. This is an absolute URI, used when necessary in the resolution of relative URIs (for example, by the fn:resolve-uri function.)

built-in functions

From XML Path Language (XPath) 2.0 (2007-01-23)

The built-in functions supported by XPath are defined in .

collation

From XML Path Language (XPath) 2.0 (2007-01-23)

A collation is a specification of the manner in which strings and URIs are compared and, by extension, ordered. For a more complete definition of collation, see .

comma operator

From XML Path Language (XPath) 2.0 (2007-01-23)

One way to construct a sequence is by using the comma operator, which evaluates each of its operands and concatenates the resulting sequences, in order, into a single result sequence.

constructor function

From XML Path Language (XPath) 2.0 (2007-01-23)

The constructor function for a given type is used to convert instances of other atomic types into the given type. The semantics of the constructor function call T($arg) are defined to be equivalent to the expression (($arg) cast as T?).

context item

From XML Path Language (XPath) 2.0 (2007-01-23)

The context item is the item currently being processed. An item is either an atomic value or a node.

context item static type.

From XML Path Language (XPath) 2.0 (2007-01-23)

Context item static type. This component defines the static type of the context item within the scope of a given expression.

context node

From XML Path Language (XPath) 2.0 (2007-01-23)

When the context item is a node, it can also be referred to as the context node.

context position

From XML Path Language (XPath) 2.0 (2007-01-23)

The context position is the position of the context item within the sequence of items currently being processed.

context size

From XML Path Language (XPath) 2.0 (2007-01-23)

The context size is the number of items in the sequence of items currently being processed.

current dateTime.

From XML Path Language (XPath) 2.0 (2007-01-23)

Current dateTime. This information represents an implementation-dependent point in time during the processing of an expression, and includes an explicit timezone. It can be retrieved by the fn:current-dateTime function. If invoked multiple times during the execution of an expression, this function always returns the same result.

data model

From XML Path Language (XPath) 2.0 (2007-01-23)

XPath operates on the abstract, logical structure of an XML document, rather than its surface syntax. This logical structure, known as the data model, is defined in .

data model schema

From XML Path Language (XPath) 2.0 (2007-01-23)

For a given node in an XDM instance, the data model schema is defined as the schema from which the type annotation of that node was derived.

default collation.

From XML Path Language (XPath) 2.0 (2007-01-23)

Default collation. This identifies one of the collations in statically known collations as the collation to be used by functions and operators for comparing and ordering values of type xs:string and xs:anyURI (and types derived from them) when no explicit collation is specified.

default collection.

From XML Path Language (XPath) 2.0 (2007-01-23)

Default collection. This is the sequence of nodes that would result from calling the fn:collection function with no arguments.

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