Has anyone given any thought / research into using eql / pathom as a basis for conceptual queries? https://www.researchgate.net/publication/221269300_Conceptual_Queries_Using_ConQuer-II My thinking was to store and potentially version / transform eql [/ast] as concept / entity intensional links within the datastore itself (though likely as metadata / transaction data). Given a specific version of the say the pathom index at a point in time, a datastore version (possibly a restricted set of filter operations) potentially you could compactly preserve a historical query through the dataspace and simplify allowing a decision support system to both recreate the original population AND allow forward migration / re-execution against a later datastore and potentially even a later index to incorporate improvements in resolvers etc.