Literals do not have identifiers, and, therefore, cannot be individually referenced like objects.
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Database · all questionsObject Oriented Database
Object Oriented Database
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A collection of literals or object types is called a bag.
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An attribute's value is either a literal or an object identifier.
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Database objects are almost always transient.
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An attribute's value is always literal.
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Specifying a key ensures that no two objects belonging to a class have the same value for the key attribute(s).
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If you know all the possible values that an attribute can have, you can enumerate those values in ODL.
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You may specify an object identifier with only one unique tag name.
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In ODL, you specify an operation using parentheses after its name.
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An ordered collection of elements of the same type are called sets.
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