Check the release notes.
Eclipse Xtext is implemented in Java, so you must have a Java Runtime Environment installed in order to proceed.
There are two easy ways to get Xtext up and running. A pre-configured Eclipse distribution is available which has already all the necessary plug-ins installed. Alternatively, you can install Xtext into your existing Eclipse by means of the Eclipse update mechanism.
If you have an Eclipse running :
Note: Xtext relies on the Antlr generator library. Unfortunately, we cannot provide this library on the official Eclipse release update sites. Instead, Xtext will try to download it on demand. To avoid this, you can manually install the feature Xtext Antlr-2.0.0 from the itemis update site ( http://download.itemis.de/updates/). The general installation procedures are not affected by this issue.
Xtext is freely available under the Eclipse Public License.
The license allows to use Xtext for development and even for developing and selling commercial products based on Xtext.
Software systems built from open source components requires manpower that understands the internal dependencies of these components and can quickly and efficiently eliminate problems, should an error occur.
itemis is the leading consulting company for Eclipse-based development tools and is the main supporter for the Xtext project. Xtext experts are available for consulting.See xtext.itemis.com for more details.