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- Is-a abstract "In knowledge representation, object-oriented programming and design (see object oriented program architecture), is-a (is_a or is a) is a subsumption relationship between abstractions (e.g. types, classes), where one class A is a subclass of another class B (and so B is a superclass of A).In other words, type A is a subtype of type B when A’s specification implies B’s specification. That is, any object (or class) that satisfies A’s specification also satisfies B’s specification, because B’s specification is weaker.The is-a relationship is to be contrasted with the has-a (has_a or has a) relationship between types (classes).It may also be contrasted with the instance-of relationship between objects (instances) and types (classes): see "type-token distinction" and "type-token relations." When designing a model (e.g., a computer program) of the real-world relationship between an object and its subordinate, a common error is confusing the relations has-a and is-a.To summarize the relations, we have hypernym-hyponym (supertype-subtype) relations between types (classes) defining a taxonomic hierarchy, where for a subsumption relation: a hyponym (subtype, subclass) has a type-of (is-a) relationship with its hypernym (supertype, superclass); holonym-meronym (whole/entity/container-part/constituent/member) relations between types (classes) defining a possessive hierarchy, where for an aggregation (i.e. without ownership) relation: a holonym (whole) has a has-a relationship with its meronym (part), for a composition (i.e. with ownership) relation: a meronym (constituent) has a part-of relationship with its holonym (entity), for a containment relation: a meronym (member) has a member-of relationship with its holonym (container); concept-object (type-token) relations between types (classes) and objects (instances), where a token (object) has an instance-of relationship with its type (class).↑ ↑ ↑ ↑ ↑".
- Is-a wikiPageExternalLink Brachman83.
- Is-a wikiPageExternalLink HainautHEHR96.html.
- Is-a wikiPageID "294441".
- Is-a wikiPageLength "9958".
- Is-a wikiPageOutDegree "48".
- Is-a wikiPageRevisionID "672693548".
- Is-a wikiPageWikiLink Abstraction.
- Is-a wikiPageWikiLink Abstractions.
- Is-a wikiPageWikiLink Aggregation_(object-oriented_programming).
- Is-a wikiPageWikiLink Category:Abstraction.
- Is-a wikiPageWikiLink Category:Articles_with_example_Java_code.
- Is-a wikiPageWikiLink Category:Knowledge_representation.
- Is-a wikiPageWikiLink Category:Object-oriented_programming.
- Is-a wikiPageWikiLink Class.
- Is-a wikiPageWikiLink Class_(computer_programming).
- Is-a wikiPageWikiLink Class_(disambiguation).
- Is-a wikiPageWikiLink Composition_(object-oriented_programming).
- Is-a wikiPageWikiLink Computer_program.
- Is-a wikiPageWikiLink Container_(abstract_data_type).
- Is-a wikiPageWikiLink Formal_specification.
- Is-a wikiPageWikiLink Has-a.
- Is-a wikiPageWikiLink Holonym.
- Is-a wikiPageWikiLink Holonymy.
- Is-a wikiPageWikiLink Hypernym.
- Is-a wikiPageWikiLink Hypernymy.
- Is-a wikiPageWikiLink Hyponym.
- Is-a wikiPageWikiLink Hyponymy.
- Is-a wikiPageWikiLink Hyponymy_and_hypernymy.
- Is-a wikiPageWikiLink Inheritance_(object-oriented_programming).
- Is-a wikiPageWikiLink Instance_(computer_science).
- Is-a wikiPageWikiLink Interface_(Java).
- Is-a wikiPageWikiLink Knowledge_representation.
- Is-a wikiPageWikiLink Knowledge_representation_and_reasoning.
- Is-a wikiPageWikiLink Liskov_substitution_principle.
- Is-a wikiPageWikiLink Member-of.
- Is-a wikiPageWikiLink Meronym.
- Is-a wikiPageWikiLink Meronymy.
- Is-a wikiPageWikiLink Object-oriented_design.
- Is-a wikiPageWikiLink Object-oriented_programming.
- Is-a wikiPageWikiLink Object_composition.
- Is-a wikiPageWikiLink Object_oriented.
- Is-a wikiPageWikiLink Part-of.
- Is-a wikiPageWikiLink Program_architecture.
- Is-a wikiPageWikiLink Ronald_J._Brachman.
- Is-a wikiPageWikiLink Software_architecture.
- Is-a wikiPageWikiLink Subclass.
- Is-a wikiPageWikiLink Subclass_(disambiguation).
- Is-a wikiPageWikiLink Subsumption.
- Is-a wikiPageWikiLink Subsumption_(disambiguation).
- Is-a wikiPageWikiLink Subtype.
- Is-a wikiPageWikiLink Subtype_polymorphism.
- Is-a wikiPageWikiLink Subtyping.
- Is-a wikiPageWikiLink Superclass.
- Is-a wikiPageWikiLink Superclass_(disambiguation).
- Is-a wikiPageWikiLink Supertype.
- Is-a wikiPageWikiLink Type.
- Is-a wikiPageWikiLink Type-token_distinction.
- Is-a wikiPageWikiLink Type-token_relations.
- Is-a wikiPageWikiLink Type_(disambiguation).
- Is-a wikiPageWikiLink Typeof.
- Is-a wikiPageWikiLink Type–token_distinction.
- Is-a wikiPageWikiLinkText "IS A".
- Is-a wikiPageWikiLinkText "IS-A".
- Is-a wikiPageWikiLinkText "Is-A relation".
- Is-a wikiPageWikiLinkText "Is-a".
- Is-a wikiPageWikiLinkText "is a".
- Is-a wikiPageWikiLinkText "is-a relationship".
- Is-a wikiPageWikiLinkText "is-a".
- Is-a wikiPageWikiLinkText "sub- or supersumption relationship".
- Is-a wikiPageWikiLinkText "subsumption".
- Is-a hasPhotoCollection Is-a.
- Is-a wikiPageUsesTemplate Template:Main.
- Is-a wikiPageUsesTemplate Template:Reflist.
- Is-a subject Category:Abstraction.
- Is-a subject Category:Articles_with_example_Java_code.
- Is-a subject Category:Knowledge_representation.
- Is-a subject Category:Object-oriented_programming.
- Is-a hypernym Relationship.
- Is-a type Person.
- Is-a type Concept.
- Is-a comment "In knowledge representation, object-oriented programming and design (see object oriented program architecture), is-a (is_a or is a) is a subsumption relationship between abstractions (e.g. types, classes), where one class A is a subclass of another class B (and so B is a superclass of A).In other words, type A is a subtype of type B when A’s specification implies B’s specification.".
- Is-a label "Is-a".
- Is-a sameAs Is-a.
- Is-a sameAs m.02p1d79.
- Is-a sameAs Is-a.
- Is-a sameAs Q1101080.
- Is-a sameAs Q1101080.
- Is-a sameAs Is-a.
- Is-a wasDerivedFrom Is-a?oldid=672693548.
- Is-a isPrimaryTopicOf Is-a.