GSLgen is a very powerful XML processing tool and code generator. In XSLT for example, the DOM tree of XSLT processing template and the DOM tree of the XML document are not related. In GSLgen the DOM tree of the processing template mimics that of the DOM tree of the XML document. Overall, this makes processing template very clean and easy to understand.

The iMatix folks really know how to a create domain specific languages – GSLgen template is really a DSL. It only takes minutes to grasp how GSLgen works. I have selected one illustrative example from the original documentation as an introduction. Why would anyone use XSLT after all?