A computer system configures data elements based on textual sources by identifying subunits of a textual source, indexing the subunits into a sequence comprised of terms, identifies based on a target a base subsequence of the sequence, and stores the terms in such a way that they can be expanded or contracted and a user can rapidly and efficiently derive relevant information and context even from a vast amount of information including by navigable display to the user. Other methods and systems of configuring and displaying data elements from textual sources are provided.