| AssertionalAxiom | 
 Abstract base class for assertional axioms (concept assertions
 and role assertions). 
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| AssociativeDlFormula | 
 This class captures the common functionalities of description logic associative formulas 
 (union and intersection). 
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| AtomicConcept | 
 This class models an atomic concept (aka concept name) in description logics. 
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| AtomicRole | 
 This class models a role in description logics. 
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| BottomConcept | 
 This class models the bottom concept (empty concept) in description logics. 
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| Complement | 
 This class models the complement (negation) in description logics. 
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| ComplexConcept | 
 The common abstract class for concepts (also called concepts, complex concepts or concept descriptions) 
 of description logics. 
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| ConceptAssertion | 
 This class models a concept assertion in description logic, i.e. 
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| DlAxiom | 
 The common abstract class for axioms of the description logic ALC. 
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| DlBeliefSet | 
 This class models a knowledge base for description logics. 
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| DlSignature | 
 This class models a description logic signature. 
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| EquivalenceAxiom | 
 This class models an equivalence axiom, also known as general concept inclusion (GCU),
 meaning an expression of the form "C is a subset of or equal to D" with C and D as Concepts. 
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| ExistentialRestriction | 
 This class models an existential restriction in description logics, 
 i.e. 
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| Individual | 
 This class models an individual in description logic, also known as an
 object. 
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| Intersection | 
 This class models an intersection in description logics. 
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| RoleAssertion | 
 This class models a role assertion in description logic, i.e. 
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| TopConcept | 
 This class models the top concept (universal concept) in description logics. 
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| Union | 
 This class models an union in description logics. 
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| UniversalRestriction | 
 This class models an universal restriction in description logics,
 i.e. 
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