All of the built-in scripts produce XML that is similar, but not interchangeable with, the XML found in a plugin descriptor. You will notice that, for usability reasons, the forms do not provide all the possible configuration elements available in plugins. As an example, the web-item built-in script does not give you the option to provide a tooltip for the web-item link, or a velocity context provider, or an icon URL.
You can work around this limitation by using this built-in script. First of all, get the required XML from one of the other fragment built-in scripts by filling out the form, then clicking the Previewbutton. Do not click the Save/Update button.
You can then copy the emitted XML into the Raw XML module built-in script, and make any modifications as required.
Using Multiple Items
The other reason for using this built-in script is it allows you to make multiple modifications that belong as a single unit in a single script, which you can enable and disable en bloc.
This is produced by the following XML:
XML aficianados will note that the above XML is not technically correct as it does not have a root element, but in this case, a root element will be automatically added for you.