XPath Functions Quick Reference

Table 103 lists the functions you can call in a query and provides short descriptions.

Table 103. XPath Function Quick Reference
Function	Source	Returns
boolean()	XPath	Boolean value that is the result of converting an object to a Boolean value. See Converting an Object to Boolean.
ceiling()	XPath	Number that is the smallest integer that is not less than a number you specify. See Obtaining the Largest, Smallest, or Closest Number.
comment()	XPath	Comment nodes. See Obtaining Particular Types of Nodes By Using Node Tests.
concat()	XPath	String that concatenates two or more strings you specify. See Concatenating Strings.
contains()	XPath	Nodes that contain the specified string. See Searching for Strings.
count()	XPath	Number of nodes in the node-set argument. See Determining the Number of Nodes in a Collection.
current()	XPath	Node for which the current template started its operation. See Obtaining the Current Node for the Current XSLT Template.
document()	XSLT	Root node of the specified document. See Accessing Other Documents During Query Execution.
element-available()	XSLT	Boolean value that indicates whether the specified element is supported by the XSLT processor. See Determining If Functions Are Available.
false()	XPath	`false`. See Obtaining Boolean Values.
floor()	XPath	Number that is the largest integer that is not greater than a number you specify. See Obtaining the Largest, Smallest, or Closest Number.
function-available()	XSLT	Boolean value that indicates whether the specified function is supported by the XPath processor. See Determining If Functions Are Available.
generate-id()	XSLT	String that uniquely, temporarily, identifies a node. See Generating Temporary IDs for Nodes.
id()	XPath	Element whose `id` attribute value matches the specified value. See Finding an Element with a Particular ID.
key()	XSLT	Node whose `key` value matches the specified key. See Finding an Element with a Particular Key.
lang()	XPath	Boolean value that indicates whether the language of the node is the language you expect. See Determining the Context Node Language.
last()	XPath	Number of nodes in the context list. See Determining the Number of Nodes in a Collection.
local-name()	XPath	Local portion of the node name, excluding the prefix. See Obtaining Namespace Information.
name()	XPath	String that contains the tag name of the node, including namespace information, if any. See Obtaining Namespace Information.
namespace-uri()	XPath	URI for the namespace of the node. See Obtaining Namespace Information.
node()	XPath	All nonattribute nodes. See Obtaining Particular Types of Nodes By Using Node Tests.
normalize-space()	XPath	String without leading or trailing white space. See Normalizing Strings.
not()	XPath	Boolean value that indicates the opposite of the specified Boolean value. See Obtaining Boolean Values.
number()	XPath	Number that is the result of converting the specified argument to a number. See Converting an Object to a Number.
position()	XPath	Position number of the node relative to the context node set. See Finding a Particular Node.
processing- instruction()	XPath	Processing instruction nodes. If you specify a literal argument, this function returns a processing instruction if its name matches the literal you specify. See Obtaining Particular Types of Nodes By Using Node Tests.
round()	XPath	Number that is the closest to the argument and is an integer. See Obtaining the Largest, Smallest, or Closest Number.
starts-with()	XPath	Boolean value that indicates if a string starts with a particular string. See Finding Strings That Start with a Particular String.
string()	XPath	String that is the result of converting some object to a string. See Converting Objects to Strings.
string-length()	XPath	Number of characters in a string you specify. See Determining the Number of Characters in a String.
substring()	XPath	Substring that is in a particular position within its string. See Finding Substrings by Position.
substring-before()	XPath	Substring that appears before a string you specify. See Finding Substrings That Appear Before Strings You Specify.
substring-after()	XPath	Substring that appears after a string you specify. See Finding Substrings That Appear After Strings You Specify.
sum()	XPath	Number that is the sum of the values of the nodes in the specified set. See Obtaining the Sum of the Values in a Node Set.
system-property()	XSLT	Object that represents the specified property. See Obtaining System Properties.
translate()	XPath	String with some characters replaced by other characters. See Replacing Characters in Strings with Characters You Specify.
true()	XPath	`true`. See Obtaining Boolean Values.
unparsed-entity-uri()	XSLT	URI of an unparsed entity with the specified name. See Obtaining the URI for an Unparsed Entity.

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