substring()

XSLT / XPath参考：XSLT元素， EXSLT函数，XPath函数，XPath轴

该substring函数返回给定字符串的一部分。

句法

参数

string_要评估的字符串。

start子字符串中string开始的位置

length（可选）子字符串的长度。如果省略，则返回的字符串将包含从start位置到string _ 的结尾的每个字符。

Returns

A string.

Notes

As in other XPath functions, the position is not zero-based. The first character in the string has a position of 1, not 0.

Defined

XPath 1.0 4.2

Gecko support

Supported.