Non-terminal symbol `XmlTreeRefs`

An XmlTreeRefs is either a single XmlTreeRef, or a sequence thereof.

Defining rules for nonterminal symbol XmlTreeRefs:

`XmlTreeRefs`		`XmlTreeRef`
		`XmlTreeRefs` `ListSep_opt` `XmlTreeRef`

Occurrences of symbol XmlTreeRefs in body of other rules:

ChildrenValue '(' XmlTreeRefs ')'

Non-terminal symbol XmlTreeRefs