Association Checks (CDM)

PowerDesigner provides default model checks to verify the validity of associations.

Check	Description and Correction
Name/Code contains terms not in glossary	[if glossary enabled] Names and codes must contain only approved terms drawn from the glossary. Manual correction - Modify the name or code to contain only glossary terms. Automatic correction - None.
Name/Code contains synonyms of glossary terms	[if glossary enabled] Names and codes must not contain synonyms of glossary terms. Manual correction - Modify the name or code to contain only glossary terms. Automatic correction - Replaces synonyms with their associated glossary terms.
Name/Code uniqueness	Object names must be unique in the namespace. Manual correction - Modify the duplicate name or code. Automatic correction - Appends a number to the duplicate name or code.
Number of links >= 2	An association is isolated and therefore does not define a relationship between entities. Manual correction: Define at least two links between the isolated association and one or several entities. Automatic correction: None.
Number of links = 2 with an identifier link	An identifier link introduces a dependency between two entities. An association with this type of link must be binary. Manual correction: Delete the unnecessary links or clear the Identifier check box for a link. Automatic correction: None.
Number of identifier links <= 1	An identifier link introduces a dependency between two entities. There can only be one identifier link between two entities otherwise a circular dependency is created. Manual correction: Clear the Identifier check box for one of the links. Automatic correction: None.
Absence of properties with identifier links	An association with an identifier link cannot have any properties. Manual correction: Move the association properties into the dependent entity (the one linked to the association with an identifier link). Automatic correction: None.
Bijective association between two entities	There are bijective associations between two entities when a two-way one to one association between the entities exist. This is equivalent to a merge of two entities. Manual correction: Merge the entities or modify the cardinality links. Automatic correction: None.
Maximal cardinality links	An association with more than two links can only have links with a maximum cardinality greater than one. Manual correction: Change the maximum cardinality of such links to be greater than 1. Automatic correction: None.
Reflexive identifier links	An identifier link introduces a dependency between two entities. An association with this type of link cannot therefore be reflexive. Manual correction: Change the relationship between the entities or clear the Identifier check box for a link. Automatic correction: None.
Name uniqueness constraint between many-to-many associations and entities	A many-to-many association and an entity cannot have the same name or code. Manual correction: Change the name or code of the many-to-many association or the name or code of the entity. If you do not, PDM generation will rename the generated table. Automatic correction: None.