Xtext comes with two different parser implementations. One is self-written and therefore automatically Eclipse IP approved. The other is based on Antlr. The Antlr parser is far better in terms of error recovery, which is an important feature when used within a text editor. Unfortunately Antlr's generator is not Eclipse IP approved and can therefore not be provided as a download from eclipse.org. To get the best out of Xtext it is recommended to use the Antlr-based parser. If you are not sure about this topic, please read the corresponding chapter in the documentation.
That is why we provide complete distributions as well as an Eclipse update site at http://xtext.itemis.com.

• Distribution: downloads from http://xtext.itemis.com

If you've already a working Galileo product running and wonder how to add the Antlr generator, you can use the update site which is also hosted at itemis.com:

• Update site: http://download.itemis.com/updates/releases