Abstract: The present disclosure includes systems and a methods for ingestion and processing of data in large volumes and varied data models. The system consists of a data intake adapter, tagging service, relation service, query service, persistence service and physical storage medium. The data intake adapters are implemented to support required data formats and models. The invention includes a method enabling assignments of tags to any data element that can be referenced in the system, including in some embodiments tables, rows, columns, data points, nodes, vectors, lists or other types. The invention further includes a method of data representation for tags data using hash tree data structures. The disclosure also includes a relations mechanism and service that is capable of defining relations between data elements. The disclosed system includes also a query service that leverages the internal data structures to provide efficient lookup and retrieval methods supporting vast range of analytical use cases.