1. A method of modifying a computer-readable elemental data structure, the method comprising: estimating, using at least one processor executing stored program instructions, a relevance associated with an elemental component, wherein the elemental component comprises an elemental concept or an elemental concept relationship between two or more elemental concepts, and wherein estimating the relevance comprises estimating a frequency of occurrence in reference data of one or more labels associated with the elemental component, wherein the elemental component includes the elemental concept, wherein the relevance associated with the elemental component comprises a concept relevance associated with the elemental concept, wherein the one or more labels associated with the elemental component comprises a label associated with the elemental concept, and wherein estimating the frequency of occurrence in the reference data of the one or more labels associated with the elemental component comprises estimating a term frequency of the label within at least a portion of the reference data; and in response to determining that the relevance associated with the elemental component exceeds a relevance threshold, modifying the elemental data structure, wherein modifying the elemental data structure comprises: adding the elemental component to the elemental data structure, and storing the relevance in data associated with the elemental component, wherein the elemental component is encoded as a computer-readable data structure storing the data associated with the elemental component.