The reason for having a database is to store data values about entities, and then to retrieve the data values regarding those entities as needed. In order to accomplish this, there must be some way to distinguish one entity from another. Entity identifiers perform this function. Entity ...
The presence of the correlation criteria facilitates the introduction of additional correlation logic to be applied to conditions of the query. In general, correlation criteria are contemplated which support correlation of entities based on time, physical location and age, for example....