Classes identify basic constructs each construct may

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Classes identify basic constructs, each construct may have attributes Classes ( Class - 1,Class - 2,..,Class - n ) Example: Top - Security is a class in a multi - level security system Role is a class in a role dependent environment
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Elements are attributes of a class a subject can have a name Element ( subject, name )
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Extends defines sub - classes extends ( class - name - child, class - name - parent ) Example: extends ( secret, classification ) A secret class extends classification an abstract class
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Relation is a relation between two classes. Relation ( class - 1,class - 2,Relation - Name,cardinality ) Cardinality = { one,some } Example Relation ( subject, verb, can, some ) A subject has a relationship ‘can’ with ‘some’ verbs
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Separate Separate is a kind of a relation Separate acts on classes with respect to a relation. Separate ( class - 1,class - 2,relation - r ) Separate class - 1 from class - 2 with respect to relation. This separates all classes that have a relation - r with class - 1 to have a similar relation to class - 2
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Separate Separate ( Internet,Disk,Write ) Separate the classes internet and disk with respect to write access. The consequences are that those classes that relate using ‘write’
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Implication Implication creates a one way relationship between relations Implication ( relation - 1, relation - 2 ) classes that are joined by relation - 1 are also joined by relation - 2, not necessarily reciprocal
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Equivalence Equivalence creates a binding between relations Equivalence ( relation - 1, relation - 2 ) classes that are joined by relation - 1 are also joined by relation - 2 and vice - versa
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