record
--1
XPath function
--2
Node collection function
--3
String function
--4
Boolean function
--5
Numerical function
1 xpath function
XPath provides a library to calculate an expression. The function is divided into node functions, string functions, Boolean functions, and numerical functions. Here will introduce several functions that XPath inevitably supported. See References [5] for parameters and return values.
2 Node Collection Functions
last
Returns the length of the context.
Position
Returns the current location of the context.
count
Returns the number of nodes.
3 text list
String
Convert objects into strings.
Concat
Connect strings.
START-with
The string specified by the first parameter starts with the string specified by the second parameter begins.
Contains
The first parameter specified by the string contains the string specified by the second parameter, returns true.
Substring-before
If the string specified by the second parameter is found in the string specified by the first parameter, the portion before the first parameter is first discovered in the first parameter.
Substring -After
If the string specified by the second parameter is found in the string specified by the first parameter, the portion after the first parameter is first discovered in the first parameter.
4 Boolean function
Boolean
Convert objects into Boolean values.
NOT
Reverse the true and false value.
True
Return true.
False
Return.
5 numeric functions
Number
Convert objects to values.
Sum
Convert the string of the strings of each node within the node set specified by the parameter, then return them and.
Round
Returns the closest integer that is closest to the value specified by the parameter.
