Hi folks, Being new to Clerezza I wonder if part of Clerezza can be used to support my current situation. I need to create an RDF-store with some logic around it. So far I came up with the following:
1) A processing engine/pipeline with basically 2 operations Put and Select. 2) The pipeline contains functional units like: authorisation (A), processing (P), validation (V), storage (S) and filtering (F) 3) Put-operation takes a RDF Graph as input and pushes it into the processing pipeline (A -> P -> V -> S) 4) Every Put contains a fragment (but still a Graph) of a namespace/context. 5) These fragments need to be accumulated into a single Graph per namespace/context. 5) Select-operation takes a (named) query (probably sparql) and pushes it into the processing pipeline (A -> S -> F) 6) Select returns one or more of these accumulated graphs. 7) The functional units are pluggable with support for more than one unit of the same type. Now I had the following in mind for using Clerezza components: - Clerezza Parser (rdf.core) for creating the RDF Graph in memory to start the Put pipeline. - Maybe using Apache Stanbol OntologyManager in the Validation unit to validate Graph content against predefined ontologies. - One of the Clerezza storage components (probably Jena Tdb) to do the actual persistent storage and retrieval in the Storage unit. - Clerezza SerializingProvider (rdf.core) for serializing the results from the Select-operation. Looking at Clerezza I greatly appreciate the abstractness from the underlying storage implementation (Jena, Sesame). However I have the impression that the Parser (rdf.core) immediately stores the Graph in the persistent storage. Is that correct? If so, how can I use the parser to first create a Graph in memory. And, later (when all criteria are met) store this memory graph into a storage component like Tdb (I can't find a suitable operation on TdbTcProvider). My apologies for being abstract, but I am not allowed (NDA) to give to many details. Any advice is highly appreciated. Regards, Minto -- ir. ing. Minto van der Sluis Software innovator / renovator Xup BV
