XSLT 3 (via XPath 3.1) has support for maps, arrays, and parsing JSON to/from those or an XML representation. The XML representation is easier to work with in 3

XSLT 3 (via XPath 3.1) has support for maps, arrays, and parsing JSON to/from those or an XML representation. The XML representation is easier to work with in 3. There's a draft version of XSLT 4 that Saxon supports which adds more capabilities for working with map and array types.