PUBLIC MARKS with tags rdf & rest

RDF is worth learning for a different reason — the profound enlightenment experience you will have when you finally get it. That experience will make you a better format and data API designer for the rest of your days, even if you never actually use RDF itself a lot. (You can get some beginning experience with RDF fairly easily by writing and modifying simple files like FOAF and DOAP for social networks and software projects, or RDFa extensions for XHTML.)

For the finder part I have implemented a SPARQL backend, which internally delegates to Sesame2, which is the same default index/query that is used to find Entities in general. This in itself is pretty cool, because it means that you can write your domain model in Java, have it be automatically persisted in a store like Neo4j, and then with no extra effort expose it through SPARQL for AJAX webapps to consume (both RDF/XML and JSON output is supported today). Minimally writing a domain model only involves writing Java interfaces (no classes), so it's pretty easy to get started.