XPath 2.0 introduced many new features XQuery-cośtam:
- Added support for all XML simple types
- Many new functions (trippled instruction count)
- All expressions evaluate to sequence
- Introduces conditional expressions and for-loops

XPath 3.0
- Dynamic function collapsible
- Inline functions
- Support for union types
- Introduced maps

[1.0] fn:last() - Returns the position of the last node in the context list [1.0] fn:position() - Returns the position of the current context node [1.0] fn:count(node-set) - Returns the number of nodes in the node-set [1.0] fn:id(object) - Returns the element specified by it's unique id, requires DTD [1.0] fn:local-name(node-set) - Returns the local-name for the first node in the node-set [1.0] fn:local-name() - Returns the local-name for the context node [1.0] fn:namespace-uri(node-set) - Returns the namespace-uri for the first node in the node-set [1.0] fn:namespace-uri() - Returns the namespace-uri for the context node [1.0] fn:name(node-set) - Returns the name for the first node in the node-set [1.0] fn:name() - Returns the name for the context node

[1.0] fn:string(object) - Returns the string representation of the object argument [1.0] fn:string() - Returns a string value representation of the context node [1.0] fn:concat(string, string, string*) - Returns the concatenation of its arguments [1.0] fn:starts-with(string, string) - Returns true if the first string starts with the second string [1.0] fn:contains(string, string) - Returns true if the first string contains the second string [1.0] fn:substring-before(string, string) - Returns the substring found before the first occurrence of the second argument [1.0] fn:substring-after(string, string) - Returns the substring found after the first occurrence of the second argument [1.0] fn:substring(string, number, number) - Returns the substring starting at second argument with lenght of third argument [1.0] fn:substring(string, number) - Returns the substring of the first argument from the position specified by the second argument [1.0] fn:string-length(string) - Returns the length of the string specified by the argument [1.0] fn:string-length() - Returns the length of the string specified by the context node [1.0] fn:normalize-space(string) - Returns a white-space normalized string [1.0] fn:normalize-space() - Returns a white-space normalized string specified by the context-node [1.0] fn:translate(string, string, string) - Replaces characters specified by the second argument using those from the third argument

[1.0] fn:boolean(object) - Returns the boolean representation of the object argument [1.0] fn:not(boolean) - Returns a boolean with the opposite value of its argument [1.0] fn:true() - Returns a boolean with the value of true [1.0] fn:false() - Returns a boolean with the value of false [1.0] fn:lang(string) - Returns true if the language of the context node is the same as the languag specified by the argument

[1.0] fn:number(object) - Returns the number representation of the object argument [1.0] fn:number() - Returns the number representation of the context node [1.0] fn:sum(node-set) - Returns the sum of all nodes in the node-set [1.0] fn:floor(number) - Returns the largest integer value not greater than the argument [1.0] fn:ceiling(number) - Returns the smallest integer value not less than the argument [1.0] fn:round(number) - Returns the integer value closest to the argument