🤯 Implement CONSTRUCT query over triple store

[ccamel]

Purpose

Implement the CONSTRUCT query over the triple store in the cognitarium smart contract, allowing to retrieve a set of triples serialized in a specific format (turtle, rdf/xml, ...).

This way of querying is particularly relevant for the purpose of Governance evaluation because it allows the retrieval of triples that constitute an RDF graph. Indeed, this graph seamlessly integrates with Prolog due to the inherent equivalence between an RDF triple and a Prolog predicate. This approach enables us to harness the semantics of ontological knowledge while maintaining its essence during interpretation within a Prolog program.

Notes:

• See W3C Sparql CONSTRUCT specification for an inspiration.

Todo

• Specify the contract messages
• Implement the query

[ccamel]

FYI @antho31