Exam 22: the Semantic Object Model

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Semantic objects are said to be:

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A group identifier:

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Semantic objects represent the user's perceptions more closely than the E-R model.

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A "hybrid object" is a semantic object that relates two or more objects and stores data that are peculiar to that relationship.

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Distinguish between the physical description and the semantic description of an attribute domain.

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Whether a developer uses an E-R model or a semantic object model,the eventual database design that is created should be exactly the same.

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Semantic objects are grouped into:

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Object identifiers may or may not be unique.

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The first attribute of a subtype object is the childID attribute.

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A composite object is a semantic object that contains:

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What type of attribute has a single element?

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The relationship between a parent object and its associated subtype objects is a(n):

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A semantic object must represent something with a physical existence.

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Explain why semantic object attributes are call "paired attributes."

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

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