Information Modeling the EXPRESS WayOxford University Press, 6. jaan 1994 - 416 pages 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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Page ix
... Constant 11.3 Type 11.4 Entity 148 149 150 151 152 153 153 154 156 11.4.1 Attribute 11.4.2 Local rule 157 162 · 11.4.3 Supertypes and subtypes 11.4.4 Interpreting supertype relationships 11.4.5 Implicit declarations 165 170 170 11.5 ...
... Constant 11.3 Type 11.4 Entity 148 149 150 151 152 153 153 154 156 11.4.1 Attribute 11.4.2 Local rule 157 162 · 11.4.3 Supertypes and subtypes 11.4.4 Interpreting supertype relationships 11.4.5 Implicit declarations 165 170 170 11.5 ...
Page xii
... Constant values . . 268 21.8 Schema data instance 268 22 Usage notes 270 22.1 EXPRESS data examples 22.2 Abstract test cases 270 271 22.3 Object bases 271 22.3.1 Input 271 22.3.2 Output 272 22.3.3 Code testing 272 22.4 Non - EXPRESS ...
... Constant values . . 268 21.8 Schema data instance 268 22 Usage notes 270 22.1 EXPRESS data examples 22.2 Abstract test cases 270 271 22.3 Object bases 271 22.3.1 Input 271 22.3.2 Output 272 22.3.3 Code testing 272 22.4 Non - EXPRESS ...
Page xiii
... constants 354 Constant E 354 Indeterminate 354 False 355 Pi 355 Self . 355 True 355 Unknown 355 F.2 Standard functions and procedures 355 Abs 355 ACos . 356 ASin 356 ATan . 356 BLength 357 • • Cos . 357 Exists 357 Exp 358 Format ...
... constants 354 Constant E 354 Indeterminate 354 False 355 Pi 355 Self . 355 True 355 Unknown 355 F.2 Standard functions and procedures 355 Abs 355 ACos . 356 ASin 356 ATan . 356 BLength 357 • • Cos . 357 Exists 357 Exp 358 Format ...
Page xxv
... constants , functions and proce- dures that can be used with EXPRESS and EXPRESS - I . It turns out that information modeling , at least when EXPRESS is used , partakes of aspects from both data modeling and object - oriented program ...
... constants , functions and proce- dures that can be used with EXPRESS and EXPRESS - I . It turns out that information modeling , at least when EXPRESS is used , partakes of aspects from both data modeling and object - oriented program ...
Page xxvii
... Constant : A value that does not change over time . Data : Symbols which represent information for processing purposes , based on explicit or implicit agreements about the meaning of the data . Datatype : A representation of a value ...
... Constant : A value that does not change over time . Data : Symbols which represent information for processing purposes , based on explicit or implicit agreements about the meaning of the data . Datatype : A representation of a value ...
Contents
The EXPRESS Language | 121 |
EXPRESS example model | 280 |
Example model instance | 302 |
Interpreting supertype relationships | 309 |
Relationships and cardinality | 316 |
An EXPRESS Metamodel | 330 |
Resources | 354 |
Bibliography | 369 |
Index | 381 |
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Information Modeling: The EXPRESS Way Douglas A. Schenck,Peter R. Wilson,Peter Robert Wilson Limited preview - 1994 |
Common terms and phrases
ABSTRACT SUPERTYPE aggregate AggregateType algorithm Andor array ASIM attribute name attribute values attributes END_ENTITY binary BOOLEAN boolean datatype car_model Chapter characters CollectionType Complete entity-level model constants constraints context database datatype defined type definition described developed digits displayed document domain DomainRule END_FUNCTION END_LOCAL END_REPEAT END_SCHEMA END_TYPE entity declaration entity instance entity type entity value EntityRef enumeration enumeration type evaluated explicit attribute EXPRESS model EXPRESS specification EXPRESS-G ExpressName False Figure formal parameters fuel consumption 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 operand operator optional valued attributes owner procedure real world redeclaration reference referenced relationship line represent Return statement rules scope Shlaer-Mellor simple types Stmts STRING string literal subset SUBTYPE symbols things transfer unique Unknown Unknown Unknown upper bound variable
Popular passages
Page 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.
Page 127 - The White Rabbit put on his spectacles. "Where shall I begin, please, your Majesty?" he asked. "Begin at the beginning," the King said gravely, "and go on till you come to the end; then stop.
Page 253 - It must not be; there is no power in Venice Can alter a decree established: 'Twill be recorded for a precedent, And many an error by the same example Will rush into the state; it cannot be.
Page 162 - How often have I said to you that when you have eliminated the impossible, whatever remains, however improbable, must be the truth?
Page 220 - If language is not correct, then what is said is not what is meant; if what is said is not what is meant, then what ought to be done remains undone...
Page 6 - Factual information (as measurements or statistics) used as a basis for reasoning, discussion, or calculation.
Page 165 - Oh, what a tangled web we weave when first we practice to deceive!
Page 316 - He saw them, in that fashion, as disponibles, saw them subject to the chances, the complications of existence, and saw them vividly, but then had to find for them the right relations, those that would most bring them out; to imagine, to invent and select and piece together the situations most useful and...
Page 211 - ALL ANIMALS ARE EQUAL BUT SOME ANIMALS ARE MORE EQUAL THAN OTHERS...
Page 5 - Examinations are formidable even to the best prepared ; for the greatest fool may ask more than the wisest man can answer.