| # Entity Type Relationships (tgerm1140s000) Use this session to maintain the entity-type relationship details. Related topics Entity Relationship Modeling Entity Rel. Diagram A graphic design of the relational data model structure. The diagram shows a (multilevel) structure that consists of entity types and entity type relationships. Entity Rel. Diagram The description or name of the entity-relationship diagram. Note The maximum length of the description is 60 characters. Version A group of model items that share some characteristics, such as the customer, owner, and effective date. Version The description or name of the version. Entity Relationship A reason of relevance for associating entities of one or two entity types. From Entity Type The first entity type in the entity-type relationship. Example The entity relationship between an order and an order line is a 1:N relationship. An order is related to one or more order lines. Vice versa, an order line is related to only one order. In this entity relationship the order is the first entity type. From Entity Type The description or name of the entity type. To Entity Type The second entity type in the entity-type relationship. Example The entity-type relationship between an order and an order line is a 1:N relationship. An order has one or more order lines. Vice versa, an order line is related to only one order. In this entity-type relationship the order line is the second entity type. To Entity Type The description or name of the entity type. Description From - To The description that identifies the from-to relationship. The description must be a verb in the third person singular. Example An order is detailed by one or more order lines. For this relationship the From-To description is: is detailed by. if the relationship is a horizontal line with the name located above, then the diagram should be read from left to right. If the name is located underneath, then the diagram should be read from right to left. if the relationship is a vertical line with the name located on the left, then the diagram should be read from top to bottom. If the name is on the right, then the diagram is read from the bottom up. Description To - From The description that identifies the to-from relationship. The description must be a verb in the third person singular. Example An order line details an order. For this relationship, the To-From description is: details. if the relationship is a horizontal line with the name located above, then the diagram should be read from left to right. If the name is located underneath, the diagram should be read from right to left. if the relationship is a vertical line with the name located on the left, then the diagram should be read from top to bottom. If the name is on the right, then the diagram is read from the bottom up. Relationship is Subtype If this check box is selected, the entity-type relationship is a subtype relationship. Physical Database Relation exists If this check box is selected, the entity relationship is equal to an ERP data dictionary relationship. Associative Table An entity type that is used to link two other entity types that have a many-to-many relationship between them. Associative Table The description or name of the associative entity type. Relationship Category A division within a system of classification. Most model items can be categorized. Relationship Category The description or name of the category. Min Cardinality From - To Infinite If this check box is selected, the maximum from-to relationship is infinite. Max Cardinality From - To Min Cardinality To - From Infinite If this check box is selected, the maximum to-from relationship is infinite. Max Cardinality To - From Owner The login of the owner. Owner The name of the owner. Generation Date BY default, the date when the entity relationship was generated. However, any authorized user can change the date into another date. Expired If this check box is selected, the entity relationship has expired because the version it is in is no longer valid. User Last Change The login of the user who made the latest change to the entity-type relationship. User Last Change The name of the user who made the latest change to the entity-type relationship. Last Change The date when the latest change was made to the entity-type relationship. Text If this check box is selected, text is available that provides you with more information about the entity-type relationship. |