antlr如何描述这样的语法

Question

如题，我想将xpath中这样的语法描述到antlr语法文件中，但不知道该怎么描述。。
[4] NCName ::= Name - (Char* ':' Char*) /* An XML Name, minus the ":" */

NameStartChar ::= ":" | [A-Z] | "_" | [a-z] | [#xC0-#xD6] | [#xD8-#xF6] | [#xF8-#x2FF] | [#x370-#x37D] | [#x37F-#x1FFF] | [#x200C-#x200D] | [#x2070-#x218F] | [#x2C00-#x2FEF] | [#x3001-#xD7FF] | [#xF900-#xFDCF] | [#xFDF0-#xFFFD] | [#x10000-#xEFFFF]

这样的两条

贴上链接：http://www.w3.org/TR/REC-xml-names/#NT-NCName

http://www.w3.org/TR/REC-xml/#NT-NameStartChar

Answer 1

http://www.shangxueba.com/jingyan/86792.html