Because CDI is so new, there's not yet a lot of information available online. That will change over time. Regardless, the CDI specification remains the authority for information on CDI. The spec is less than 100 pages and is quite readable (don't worry, it's not like your Blu-ray player manual). Of course, it covers many details we've skipped over here. The spec is available on the JSR-299 page at the JCP website.

The CDI reference implementation, Weld, is being developed at the Seam project. The RI development team and the CDI spec lead blog at in.relation.to. This guide was originally based on a series of blog entries published there while the specification was being developed. It's probably the best source of information about the future of CDI, Weld and Seam.

We encourage you to follow the weld-dev mailing list and to get involved in development. If you are reading this guide, you likely have something to offer.