16. The computer system of claim 14 , further comprising program instructions to filter the one or more of the query domains into a plurality of filtered query domain sets prior to the prioritizing of the one or more query domains.
14. A computer system comprising: one or more hardware processors, one or more computer-readable memories, and one or more computer-readable, tangible storage devices; program instructions, stored on at least one of the one or more storage devices for execution by at least one of the one or more processors via at least one of the one or more memories, to perform natural language processing and semantic processing on a natural language query to identify data sets relevant to the natural language query; program instructions, stored on at least one of the one or more storage devices for execution by at least one of the one or more processors via at least one of the one or more memories, group the data sets into one or more query domains based at least in part on one or more relationships among the data sets, wherein each query domain includes a data set comprising a fact table that has one-to-many cardinality with a plurality of other data sets and no many-to-one cardinality with any data set, and one or more data sets each having a direct many-to-one cardinality relationship with the fact table; program instructions, stored on at least one of the one or more storage devices for execution by at least one of the one or more processors via at least one of the one or more memories, to prioritize the one or more query domains; and program instructions, stored on at least one of the one or more storage devices for execution by at least one of the one or more processors via at least one of the one or more memories, to load the one or more query domains in an order based on the prioritizing of the query domains.