How knowledge is shared in CoM?
In the concept-oriented data model higher level concepts are supposed to be more stable because they describe common terms used in subconcepts. In other words, the syntax and semantics of superconcepts changes much less frequently then those of the subconcepts. The terms in the concept-oriented model are items (not concepts) from the common superconcepts. Having a common set of superconcepts with its term items allows us to position our own custom items in one and the same common space. In other words, such an approach allows sharing the space structure and its coordinate system. In order to define a new item we have to specify its position in this common space by specifying its coordinates from the superconcepts. Thus we can link our new custom terms to the system of common terms. An example of such a common system of terms might be a product categorization schema, which consists of a set of concepts along with their semantics describing a list of products. Once such a schema has been
