It would not make sense to start from an XSLT. An XSLT is only a set of transformation rules (a transformation stylesheet). If there is nothing to transform, then the stylesheet produces nothing.

But you can kind of achieve what you want by treating the initial XML as a "view definition/configuration", and the referenced XSLT as a "view builder", and referencing your "model" as an external document via XPath document and applying to the XSLT template(s). i.e. you create configurations of your view that apply external data.