
From all the exhibitors, the ones that kept my attention were The Anzo suite (open source project), ORDI and Allegrograph RDF store.
Developped by Cambridge Semantics, in Java, Anzo suite, especially, Anzo on the web and Anzo collaboration server, is the closest tools to CubicWeb, providing a multi source data server and an AJAX/HTML interface to develop semantic web applications, customize views of the data using a templating language. It is available in open source.
The feature that I think was interesting is an assistant to load data into their application that then helps the users define the data model based on that data. The internal representation of the content is totally transparent to the user, types are inferred by the application, as well as relations.

Allegrograph RDF store is a potential candidate for another source type in CubicWeb . It is already supported by Jena and Sesame framework.
They developped a Python client API to attract pythonist in the Java world.
They all agreed on one thing : the use of SPARQL should be the standard query language. I quickly heard about Knowledge Interface Format (KIF) which seems to be an interesting representation of knowledge used for multi-lingual applications. If there was one buzz word to recall from the conference, I would choose ontology :)
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