Reuseware Composition Framework
Components, Modules, Aspects or something new?
Introduce new Composition Techniques into your Language of Choice with Reuseware!

Assigning Editors to Xcerpt programs - Screencast

Reuseware comes with an editor with built-in syntax highlighting and error reporting for Xcerpt and Modular Xcerpt programs. The screencast shows how files with the extension .xcerpt and .mxcerpt are assigned to this editor using the file associations dialog.