XPath - Axes and Node Set Functions

Axes | Node Set Functions |
child
axis contains the children of the context node
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last()
returns a number equal to the context size from the expression evaluation context
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descendant axis contains the descendants of the context node; a descendant is a child or a child of a child and so on
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position()
function returns a number equal to the context position from the expression evaluation context
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parent axis contains the parent of the context node
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count(node-set)
returns the number of nodes in the argument node-set
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ancestor axis contains the ancestors of the context node; the ancestors of the context node consist of the parent of context node and the parent's parent and so on
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node-set id(object)
selects elements by their unique ID
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following-sibling axis contains all the following siblings of the context node
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string local-name(node-set?)
returns the local part of the expanded-name of the node in the argument node-set that is first in document order
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preceding-sibling axis contains all the preceding siblings of the context node
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string namespace-uri(node-set?)
returns the namespace URI of the expanded-name of the node in the argument node-set that is first indocument order
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following axis contains all nodes in the same document as the context node that are after the context node in document order, excluding any descendants and excluding attribute nodes and namespace nodes
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string name(node-set?)
returns a string containing a QName representing the expanded-name of the node in the argument node-set that is first in document order
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preceding axis contains all nodes in the same document as the context node that are before the context node in document order, excluding any ancestors and excluding attribute nodes and namespace nodes
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attribute axis contains the attributes of the context node; the axis will be empty unless the context node is an element
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namespace axis contains the namespace nodes of the context node; the axis will be empty unless the context node is an element
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self axis contains just the context node itself
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descendant-or-self axis contains the context node and the descendants of the context node
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ancestor-or-self axis contains the context node and the ancestors of the context node; thus, the ancestor axis will always include the root node
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