EMF Index is an extensible framework for indexing EMF-based models and instances. It includes components for collection index data, persisting index data and querying without loading any EMF resources.
Work on the EMF Index project has just begun, so there is currently no documentation. We plan to add it as soon as the API and implementation has matured.
The latest news on EMF Index can be obtained by subscribing to the developer mailing list.
We collect a couple of resources in the Eclipse WiKi. have a look at http://wiki.eclipse.org/EmfIndex.