| # エンティティタイプ関係 (tgerm1140s000) セッションの目的: maintain the entity-type relationship details. 関連トピック Entity Relationship Modeling エンティティ関係ダイアグラム 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. 注意 The maximum length of the description is 60 characters. バージョン 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. データエンティティ関係 A reason of relevance for associating entities of one or two entity types. 開始エンティティタイプ The first entity type in the entity-type relationship. 例 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. 終了エンティティタイプ The second entity type in the entity-type relationship. 例 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. 開始-終了の関係記述 The description that identifies the from-to relationship. The description must be a verb in the third person singular. 例 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. 終了-開始の関係記述 The description that identifies the to-from relationship. The description must be a verb in the third person singular. 例 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. 関係をサブタイプにする このチェックボックスがオンの場合、 the entity-type relationship is a subtype relationship. 物理データベース関係存在 このチェックボックスがオンの場合、 the entity relationship is equal to an ERP data dictionary relationship. 関連テーブル 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. 関係分類 A division within a system of classification. Most model items can be categorized. Relationship Category The description or name of the category. 最小開始-終了カーディナリティ 無限 このチェックボックスがオンの場合、 the maximum from-to relationship is infinite. 最大開始-終了カーディナリティ 最小終了-開始カーディナリティ 無限 このチェックボックスがオンの場合、 the maximum to-from relationship is infinite. 最大終了-開始カーディナリティ 所有者 The login of the owner. Owner The name of the owner. 生成日 BY default, the date when the entity relationship was generated. However, any authorized user can change the date into another date. 期限切れ このチェックボックスがオンの場合、 the entity relationship has expired because the version it is in is no longer valid. 最終変更ユーザ 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. 最終変更 The date when the latest change was made to the entity-type relationship. テキスト このチェックボックスがオンの場合、 text is available that provides you with more information about the entity-type relationship. |