Abstract: A subgraph storage memory stores subgraphs populated with data classified into features based on data title; each of the subgraphs has a plurality of elements; each of the elements has a features with different values. For each subfeature of a plurality of subfeatures, the different values assigned to a combination of one of the elements and one or more features are used to create a method to evaluate the subgraphs on the one or more features, as a subfeature which provides scoring information on a subgraph. For each metafeature, plural subfeatures among the plurality of subfeatures are selected to be composited into the metafeature; and for each subgraph, the plural subfeatures of each metafeature are composited to provide metafeature scores. Selected subgraphs in a universe of subgraphs with metafeature scores are presented as context for comparing the selected subgraphs; each of the selected subgraphs has different selections of elements.