Non-terminal symbol `XmlTreeRef`

Defining rules for nonterminal symbol XmlTreeRef:

XmlTreeRef XmlChildSpec AttributeName_opt

Occurrences of symbol XmlTreeRef in body of other rules:

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

Non-terminal symbol XmlTreeRef