Not XPath, but for folks interested in querying (rather than walking) syntax trees for arbitrary nodes, this is also a cool feature of tree-sitter[1]. It uses a

Not XPath, but for folks interested in querying (rather than walking) syntax trees for arbitrary nodes, this is also a cool feature of tree-sitter[1]. It uses a scheme-like syntax, and it’s impressively efficient. And in terms of XPath, for folks using a JS stack, fontoxpath[2] supports a DOM facade adapter interface which allows for querying any arbitrary tree-like structure, so it could certainly handle the same use case. 1: https://tree-sitter.github.io/tree-sitter/using-parsers#pattern-matching-with-queries https://tree-sitter.github.io/tree-sitter/using-parsers#patt... 2: https://github.com/FontoXML/fontoxpath https://github.com/FontoXML/fontoxpath