System and method for performing semantically-informed federated queries across a polystore

1. A computer-implemented method comprising

receiving a node group at an integration module, wherein the node group includes one or more requests for internal data and external data, wherein internal data is data stored in an internal datastore and external data is data stored outside of the internal data store;

identifying in a configuration data, one or more meta-data nodes from the node group, wherein each meta-data node indicates a request for external data;

retrieving the internal data via execution of an internal data query;

determining an order of execution for the one or more meta-data nodes;

executing a first meta-data node based on the determined order to generate a first result;

ingesting the first result into a semantic datastore; and

executing a query to generate a final result, wherein the query includes the retrieved internal data and the ingested first result.

2. The method of claim 1 , wherein the order of execution of the meta-data nodes is based on whether the execution of a given meta-data node uses a result of the execution of another meta-data node.

3. The method of claim 1 , wherein, prior to executing the query to generate the final result:

generating the query in SPARQL query language.

4. The method of claim 1 , further comprising, prior to executing the query to generate the final result:

executing a second meta-data node based on the generated first result to generate a second result;

ingesting the second result in the semantic datastore; and

executing the query to generate the final result, wherein the query includes the received internal data, the ingested first result and the ingested second result.

5. The method of claim 1 , wherein ingesting the first result into the semantic data store further comprises:

ingesting the first result into an ingestion node group, wherein the ingestion node group is different from the node group.

6. The method of claim 1 , wherein each node group includes one or more nodes, and each node: represents a class variable in a query, has a unique identifier and a list of properties.

7. A system comprising:

an integration module;

one or more external data stores storing external data, wherein external data is data stored outside of an internal data store;

a memory storing program instructions: and

an integration processor, coupled to the memory, and in communication with the signature module and operative to execute program instructions to:

receive a node group at the integration module, wherein the node group includes one or more requests for internal data and external data, wherein internal data is data stored in an internal datastore;

identify in a configuration data one or more meta-data nodes from the node group, wherein each meta-data node indicates a request for external data;

retrieve the internal data via execution of an internal data query;

determine an order of execution for the one or more meta-data nodes;

execute a first meta-data node based on the determined order to generate a first result;

ingest the first result into a semantic datastore; and

execute a query to generate a final result, wherein the query includes the retrieved internal data and the ingested first result.

8. The system of claim 7 , wherein the order of execution of the meta-data nodes is based on whether the execution of a given meta-data node uses a result of the execution of another meta-data node.

9. The system of claim 7 , wherein, prior to execution of the query, the query is generated in SPARQL query language.

10. The system of claim 7 , further comprising, prior to executing the query to generate the final result, program instructions to:

execute a second meta-data node based on the generated first result to generate a second result;

ingest the second result in the semantic datastore; and

execute the query to generate the final result, wherein the query includes the generate internal data, the ingested first result and the ingested second result.

11. The system of claim 7 , wherein ingesting the first result into the semantic data store further comprises program instructions to:

ingest the first result into an ingestion node group, wherein the ingestion node group is different from the node group.

12. The system of claim 7 , wherein each node group includes one or more nodes, and each node: represents a class variable in a query, has a unique identifier and a list of properties.

13. A non-transient, computer-readable medium storing instructions to be executed by a processor to perform a method comprising:

receiving a node group at an integration module, wherein the node group includes one or more requests for internal data and external data, wherein internal data is data stored in an internal datastore and external data is data stored outside of the internal data store;

identifying in a configuration data, one or more meta-data nodes from the node group, wherein each meta-data node indicates a request for external data;

retrieving the internal data via execution of an internal data query;

determining an order of execution for the one or more meta-data nodes;

executing a first meta-data node based on the determined order to generate a first result;

ingesting the first result into a semantic datastore; and

executing a query to generate a final result, wherein the query includes the retrieved internal data and the ingested first result.

14. The medium of claim 13 , wherein the order of execution of the meta-data nodes is based on whether the execution of a given meta-data node uses a result of the execution of another meta-data node.

15. The medium of claim 13 , wherein, prior to execution of the query, the query is generated in SPARQL query language.

16. The medium of claim 13 , further comprising, prior to executing the query to generate the final result:

executing a second meta-data node based on the generated first result to generate a second result;

ingesting the second result in the semantic datastore; and

executing the query to generate the final result, wherein the query includes the retrieved internal data, the ingested first result and the ingested second result.

17. The medium of claim 13 , wherein ingesting the first result into the semantic data store further comprises:

ingesting the first result into an ingestion node group, wherein the ingestion node group is different from the node group.

18. The medium of claim 13 , wherein each node group includes one or more nodes, and each node: represents a class variable in a query, has a unique identifier and a list of properties.

19. The method of claim 1 , wherein determining the order of execution for the one or more meta-data nodes is based on a determination that the execution of any of the one or more meta-data nodes uses data from another of the one or more meta-data nodes.