Information Modeling the EXPRESS Way
Information modeling technology--the open representation of information for database and other computing applications--has grown significantly in recent years as the need for universal systems of information coding has steadily increased. EXPRESS is a particularly successful ISO International Standard language family for object-flavored information modeling. This cogent introduction to EXPRESS provides numerous, detailed examples of the language family's applicability to a diverse range of endeavors, including mechanical engineering, petroleum exploration, stock exchange asset management, and the human genome project. The book also examines the history, practicalities, and implications of information modeling in general, and considers the vagaries of normal language that necessitate precise communication methods. This first-ever guide to information modeling and EXPRESS offers invaluable advice based on years of practical experience. It will be the introduction that students as well as information and data modeling professionals have been waiting for.
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ABSTRACT SUPERTYPE aggregate algorithm array ASIM attribute name attribute values binary boolean boolean datatype car model characters Complete entity-level model constants constraints context database datatype definition derived attribute described developed digits displayed document Domain Rule embedded remark END ENTITY END FUNCTION END SCHEMA END TYPE END_ENTITY END_TYPE entity declaration entity type entity value enumeration type evaluated explicit attribute EXPRESS model EXPRESS specification EXPRESS-G ExpressName False Figure formal parameters function returns garage given graphical IDEF1X identifier imported information base information model inherited INTEGER interface inverse attribute Inverse cardinality language literate programming logical logical value made_by manufacturer meta-model object OneDf operand operator optional valued attributes owner pseudotype real world redeclaration reference referenced relationship line represent Return statement scope Shlaer-Mellor simple types SIZEOF STRING string literal structure subset SUBTYPE SUPERTYPE OF ONEOF supertypes and subtypes symbols things transfer TYPEOF unique upper bound variable
Página xxvii - When I use a word," Humpty Dumpty said, in rather a scornful tone, "it means just what I choose it to mean — neither more nor less." "The question is," said Alice, "whether you can make words mean so many different things.
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