64. A system for providing interactive knowledge discovery service to a client or user comprising: a receiving module configured to receive an input from a client or user over a data network; an access module, comprised of at least one non-transitory computer-readable storage medium having computer executable instructions thereon and/or one or more processing apparatuses and/or one or more data communication devices, providing access to at least one processing device and/or at least one non-transitory computer-readable storage medium over a first network; a facilitating module facilitating access to at least one content corresponding to the client's or user's input, said at least one content is an output of at least one software module executed using one or more processing devices and/or one or more computer-readable storage medium over a second network to perform: accessing or building a first one or more data structures corresponding to at least one participation matrix representing participation of ontological subjects of a first predefined order into partitions or ontological subjects of a second predefined order of a body of knowledge; accessing, or building in real time, a second one or more data structures corresponding to association strengths between a plurality of ontological subjects of a predefined order; wherein said association strength is a function of: i. probability of occurrences of some of the ontological subjects of the first order in partitions or ontological subjects of a predefined order of the body of knowledge, and ii. co-occurrences of some ontological subjects of the first order in some of partitions or ontological subjects of a predefined order; accessing evaluated, or evaluating in real time, value significances for one or more partitions or one or more ontological subjects of the body of knowledge, based on data of one or more of said first and second one or more data structures and in respect to at least one significance aspect of the one or more partitions or one or more ontological subjects of the body of knowledge; and providing, using one or more data processing or computing devices, a content according to the client's or user's input using one or more partitions of the body of knowledge based on the evaluated value significances of the one or more partitions and/or one or more ontological subjects of the body of knowledge.
64. A system for providing interactive knowledge discovery service to a client or user comprising: a receiving module configured to receive an input from a client or user over a data network; an access module, comprised of at least one non-transitory computer-readable storage medium having computer executable instructions thereon and/or one or more processing apparatuses and/or one or more data communication devices, providing access to at least one processing device and/or at least one non-transitory computer-readable storage medium over a first network; a facilitating module facilitating access to at least one content corresponding to the client's or user's input, said at least one content is an output of at least one software module executed using one or more processing devices and/or one or more computer-readable storage medium over a second network to perform: accessing or building a first one or more data structures corresponding to at least one participation matrix representing participation of ontological subjects of a first predefined order into partitions or ontological subjects of a second predefined order of a body of knowledge; accessing, or building in real time, a second one or more data structures corresponding to association strengths between a plurality of ontological subjects of a predefined order; wherein said association strength is a function of: i. probability of occurrences of some of the ontological subjects of the first order in partitions or ontological subjects of a predefined order of the body of knowledge, and ii. co-occurrences of some ontological subjects of the first order in some of partitions or ontological subjects of a predefined order; accessing evaluated, or evaluating in real time, value significances for one or more partitions or one or more ontological subjects of the body of knowledge, based on data of one or more of said first and second one or more data structures and in respect to at least one significance aspect of the one or more partitions or one or more ontological subjects of the body of knowledge; and providing, using one or more data processing or computing devices, a content according to the client's or user's input using one or more partitions of the body of knowledge based on the evaluated value significances of the one or more partitions and/or one or more ontological subjects of the body of knowledge. 69. The system of claim 64 , wherein further includes computer-readable storage media, over the first and/or over the second network, to store one or more of the following: i. at least one composition as a body of knowledge, ii. at least some of the partitions of the at least one composition, iii. at least some ontological subjects, iv. at least one set of data respective of a value significances of the partitions and/or the ontological subjects of the body of knowledge, v. one or more index list of the partitions and the ontological subjects of the body of knowledge, vi. at least one pre-made content composition from the body of knowledge, vii. at least some of the user's input.