The 3.1-SNAPSHOT is the unreleased version of GeoAPI currently in development. Developers working on projects who need long term stability should use the released 3.0.0 version of the API rather than the 3.1-SNAPSHOT, formalized with the OGC 09-083 specification document.
This release requires a Java environment Java 5 or higher. Nightly builds can be obtained from the Jenkins automated build tool's output page.
A milestone is created on a regular basis. API changes compared to the previous versions are documented in the changes page.