A taxonomy model in a unified data store includes a data graph structure with self-describing data objects each of which includes a unique identifier, a relationship object linking the self-describing data object to a plurality of other self-describing data objects, a domain object linking the self-describing data object to a plurality of domains, and a token object representing the self-describing data object within a domain. The model further includes an n-tuple-based multimodal data structure a content addressable memory, a tuple-reader, and a tuple evaluator configured with a set of tuple semantic rules.