1. A computer system for generating and providing one or more data structures corresponding to indirect association strengths of ontological subjects of a composition comprising: one or more data processing or computing devices having a singular or compound processing speed of one thousand million or larger than one thousand million instructions per second, a first hardware data storage, comprising one or more non-transitory storage devices, storing data of association strengths of ontological subjects of a composition by having executed a method comprising: one or more data structures corresponding to co-occurrences of a plurality of ontological subjects of the composition within predefined proximities in the composition, building one or more data structures using data of said one or more data structures corresponding to said co-occurrences, corresponding to association strength spectrum vectors for a plurality of ontological subjects of the composition according to at least one association strength measure, wherein each association spectrum vector indicates association strength between one of the ontological subjects of the composition with one or more ontological subjects of the composition, storing said one or more data structures corresponding to said association strength spectrums in said first hardware data storage, a second hardware data storage, comprising one or more non-transitory storage devices, storing data of indirect association strengths of ontological subjects of a composition by: calculating, using one or more data processing or computing devices and said hardware data storage storing data of association strengths of ontological subjects of the composition, an indirect association strength value between a pair of ontological subjects as a function of the association strength spectrum vectors and invert of their co-occurrence number of the pair of ontological subjects, and generating one or more data structures corresponding to the indirect association strengths of a plurality of ontological subjects of the composition and storing the generated data structures corresponding to the indirect association strengths in said second hardware data storage.