天空
发表于 2025-3-25 06:29:19
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下边深陷
发表于 2025-3-25 08:53:35
Object Relater , (OR+)d the Object Database Manipulation Language (ODML). These languages extend and imitate an ODMG standard for object databases (Cattel et al. 2000, 1997). Adding ORN to ObjectStore increases the productivity of developing object database systems and improves data integrity in these systems. Implementa
不舒服
发表于 2025-3-25 15:04:47
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THROB
发表于 2025-3-25 17:37:04
Association Semanticsleties. These subtleties can lead to associations and combinations of associations that may be mathematically inconsistent or ambiguous. With a modeling tool, like the ORN Simulator, association semantics can be fine-tuned and any inconsistencies or potential ambiguities can be detected by database
VAN
发表于 2025-3-25 20:19:02
Adding ORN to the ODMG Standard for ODMSscapabilities like concurrency control and recovery to manage access to these objects. An ODBMS, one type of ODMS, stores the objects directly in an object database. An . (ODM), another type of ODMS, stores the objects in another database system representation, usually relational (Cattel et al., 2000
地壳
发表于 2025-3-26 03:04:59
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indoctrinate
发表于 2025-3-26 05:47:53
Mapping Database Models to DDLs Both chapters presented an example of an ORN-extended class diagram that modeled a company database. Chapters 6 and 7 also gave DDLs that implemented the model as an ORN-extended RDBMS and ORN-extended ODBMS, respectively.
颠簸地移动
发表于 2025-3-26 09:23:28
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衣服
发表于 2025-3-26 14:53:29
Bryon K. EhlmannProvides unique association patterns that help make database modeling easier and more exact.Unique ORN notation closes the gap between database modeling and definition, thus improving database develop
吊胃口
发表于 2025-3-26 17:57:01
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