If you want more powerful tools for web development, you can download and install the Eclipse Web Tools Platform (WTP), as described in the help topic Installing the Eclipse Web Development Tools. Once you've installed the WTP, the HTML editor and the Web Page Editor are available for HTML files, but not for .csp files. The following steps describe how to configure Atelier so that these editors are available for .csp files.First, you need to edit the File Associations preferences.
The File Associations help topic in the Eclipse Workbench User Guide provides more information on working with the File associations preference.In order for these editors to work properly, you also need to edit the content type preferences.
Having made these edits, you can easily open *.csp files with the HTML editor and the Web Page Editor. Csp-specific content generates warnings about unknown tags, but HTML editing features such as colorization are available.
Editing Web Applications
Updating and Extending Atelier
Installing the Eclipse Web Developer Tools