Name of Technology
Lightweight XML markup language for describing Eclipse SWT / RCP user interfaces. It includes an Eclipse Web Tools based IDE editor plug-in.
Ralf Ebert, active
EPL, minor parts Apache License 2.0
See Developer guide, markup syntax for a full summary. Maybe you can use some language/feature ideas.
It provides a very clean and easy markup syntax for construction of SWT user interfaces using XML markup. The language is directly derived from inspecting the SWT library. An extension to the Web Tools XML editor is provided to provide developers with code completion and instant preview. Parser implementation is as simple as possible, well-tested and stable. Support for own markup extensions is missing at the moment and to be provided in future versions.