Utilities for determining if characters belong to character classes defined by the XML specs.
没有声明运行依赖。
^8.1.0
^4.2.1
^5.2.7
^4.2.0
^2.0.23
^3.0.5
^6.2.0
^8.3.0
^5.19.0
^4.1.0
^3.6.2