Intersection table representing the resolution of a many to many relationship.

e_and_p_data_s (FSK, M: CHAR VARYING(19))
e_and_p_data_t (M: CHAR VARYING(16))
data_collection_s (FSK, M: CHAR VARYING(19))

data_collection.collection_content
Defines the E and P data instances which are part of the collection.
e_and_p_data.data_collection
Indicates the data collections that include this instance of E and P data.
e_and_p_data_s: Implements a foreign key to a row in one of the tables projected from entity e_and_p_data depending on the value of the next column (See below).
e_and_p_data_t: Defines the name of the referenced table. Possible values are defined in @e_and_p_data.
data_collection_s: Defines a foreign key to table data_collection.