1. A system for storing data using a knowledge representation scheme in a multi-layered database, the system comprising: a processor; an operation module coupled to the processor to: receive attributes including properties and relationships of a real world entity and at least one of an action capability of the real world entity for storage in the multi-layered database, from a user; store a participant-entity node corresponding to the real world entity in an action graph layer of the multi-layered database, wherein the participant-entity node is associated with participant properties that characterize the participant-entity node based on the attributes of the real world entity, wherein the participant-entity node is related to at least one other participant-entity node to obtain participant relationship properties, and wherein the participant-entity node is at least one of a subject node, an object node, and a primitive literal string node; store an action node corresponding to the action capability of the real world entity in the action graph layer of the multi-layered database wherein the action node is associated with action properties, wherein the action node is related to at least one other action node to obtain an action relationship, wherein the action node is further related to the participant-entity node to obtain an action participant relationship, wherein the action-participant relationships comprise at least one of a modal relationship and a general relationship connecting at least an action node to one or more participant-entity nodes to facilitate many-to-many participant-entity mapping, wherein the modal relationship relates the action node to the subject node, and wherein the general relationship relates the action node to at least an object node or a primitive literal string node; a decomposer module coupled to the processor to: decompose the participant-entity node, the participant-properties, the action node, and the action-properties of the action graph layer into nodes and properties associated with the corresponding nodes; decompose the participant-relationship, the action-relationship, the action-participant relationship, and corresponding relationship properties of the relationships in the action graph layer, into edges connecting the nodes and edge properties associated with the corresponding edges respectively; store the nodes, the edges, the node properties, and the edge properties in a standard graph layer of the multi-layered database; decompose further the nodes, the edges, the node properties, and the edge properties of the standard graph layer into data and metadata associated with the data; and store the data and the metadata in a backend database layer of the multi-layered database.