Exam 22: the Semantic Object Model

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Group attributes are composites of other attributes.

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True

A "composite object" cannot contain more than one multivalued attribute.

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False

Describe the two ways that semantic object views can be used.

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A semantic view can be used: (1)during database design to reverse-engineer a data model,since the view an application has of an object is represented in the reports,forms and queries of that application,and (2)once the database structure has been created,views can be used to develop new forms and reports from the existing database.

Explain the differences between the E-R model and the semantic object model.

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The key of an attribute is a description of an attribute's possible values.

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Explain the concept of semantic objects as being a "sufficient description."

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The term "semantic" means:

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A version object:

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An association object relates two (or more)objects and stores data that are peculiar to that relationship.

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A simple attribute has only one element.

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A hybrid object is a semantic object that contains at least one:

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A subtype inherits all the attributes of its parent.

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A simple object is a semantic object that contains only:

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What type of attribute is composed of other attributes?

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The cardinalities of an attribute operate only between the attribute and the container of the attribute.

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A "simple object" can contain only simple attributes.

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Semantic objects represent distinct identities.

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Subtype objects can be:

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An object identifier is one or more attributes that the users employ to identify object instances.

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A parent object is also know as a(n):

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