Linkages

Consider the following rules:

The linkage must connect records implementing the entities that participate in the relationship that the relationship implementation represents.
A linkage must target an identifier that identifies the to record.
The relationship implementation must be many-to-many technique or foreign key technique.

The following table describes the content of each field type:

Field Name	Content
MODEL_NAME	Host Encyclopedia name of the model
RECORD_TYPE	O (Object Record)
OBJECT_TYPE	LINKAGE
OBJECT_NAME	Linkage ID (mandatory, must be unique)
REF_OBJ_1	Name of the record this linkage is from (mandatory)
REF_OBJ_2	Name of the data record this linkage is to (mandatory)
REF_OBJ_3	Unique ID of the identifier that this linkage targets (mandatory) (The identifier of the to record is used to choose the foreign key fields.)
NUM_PROP_1	Unused
NUM_PROP_2	Unused
NUM_PROP_3	Unused
NUM_PROP_4	Unused
NUM_PROP_5	Unused
NUM_PROP_6	Unused
NUM_PROP_7	Unused
NUM_PROP_8	Unused
CHAR_PROP_1	Database or system-enforced: I (System) D (Database)
CHAR_PROP_2	Referential constraint option: D (Cascade delete) R (Restrict) N (Nullify)
CHAR_PROP_3	Unused
CHAR_PROP_4	Unused
CHAR_PROP_5	Unused
CHAR_PROP_6	Unused
CHAR_PROP_7	Unused
CHAR_PROP_8	Unused
NAME_1	Unique ID of the relationship implementation this linkage is used in (mandatory)
NAME_2	Name of the linkage