“org.eclipse.wst.sse.ui” plugin missing when installing Android Editor in Eclipse

After installing a ’stock’ Eclipse straight from Fedora 9 repositories I followed Google’s documentation regarding installing Android SDK and Eclipse Android tools when I came across an error in Eclipse telling me that org.eclipse.wst.sse.ui was missing.

This is the solution (credit to Google):

The “Android Editors” feature of the ADT Plugin requires specific Eclipse components, such as WST. If you encounter this error message during ADT installation, you need to install the required Eclipse components and then try the ADT installation again. The easiest way to install the required components for the Android Editors feature of ADT is the following:

* From the dialog where you select the Update sites to visit, select the checkboxes for both the ADT site, and the Callisto/Europa/Ganymede Discovery Site (you may want to check Automatically select mirrors at the bottom).
* Click Finish.
* In the Next dialog, select the Android Plugins.
* Now, expand the tree item of the discovery site. It seems that if you don’t do it, it doesn’t load the content of the discovery site.
* On the right, click Select required. This will select all the components that are required to install the Android plugin (wst, emf, etc…).
* Click Next, accept the agreement, click Install All, and restart Eclipse.

http://code.google.com/android/kb/troubleshooting.html#installeclipsecomponents