XSLT 3.0 contains basic facilities for transforming JSON as well XML. But looking at actual use cases, it’s clear that some things are a lot harder than they need to be. How could we extend make transformations easy XML transformations, using the same rule-based tree-walking paradigm? Some of these extensions already implemented in current Saxon releases, so starting get user feedback.

A W3C Community Group has been formed to develop proposed specifications for 4.0 versions of XSLT, XPath, and XQuery. One the aims is provide improved capabilities processing JSON, associated constructs in data model such as maps arrays. development threads conversion between XML, other formats HTML CSV. This paper looks at one particular aspect proposals, a new function XML-to-JSON conversion.