You could use an elaborate filter with jq (see https://stackoverflow.com/a/73040814/452614 https://stackoverflow.com/a/73040814/452614) to transform JSON to XML

You could use an elaborate filter with jq (see https://stackoverflow.com/a/73040814/452614 https://stackoverflow.com/a/73040814/452614) to transform JSON to XML and then use an XQuery implementation to process the document. It would be quite powerful, especially if the implementation supports XML Schema. I have not tested it. Or https://github.com/AtomGraph/JSON2XML https://github.com/AtomGraph/JSON2XML which is based on https://www.w3.org/TR/xslt-30/#json-to-xml-mapping https://www.w3.org/TR/xslt-30/#json-to-xml-mapping It even looks like we could use an XSLT 3 processor with the json-to-xml function (https://www.w3.org/TR/xslt-30/#func-json-to-xml https://www.w3.org/TR/xslt-30/#func-json-to-xml) and then use XQuery or stay with XSLT 3. Now I have to test it.