Can be a new feature?
On this URL: GET /mercedes/e55;color=black/2006/interior;color=tan
Mapped as: @Path("/{make}/{model}/{year}/{extra}")
Can access to all "color" matrix params, for example, with:
@MatrixParam("model;color")
@MatrixParam("extra;color")
Thanks to Bill Burke for example (on their book "RESTfull Java with JAX-RS)