Software-Bewertung: Ein semantischer Ansatz für Infomationsmasse

Overview

Die vorliegende Arbeit stellt einen Ansatz zur quantitativen
Erfassung semantischer Informationsinhalte vor. Da Programme
Transformationen von Information beschreiben, werden gr|~ere
Kenntnisse der Charakteristika von Information auch zu einem besseren Verst{ndnis der Software-Produktion f}hren.
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Overview

Die vorliegende Arbeit stellt einen Ansatz zur quantitativen
Erfassung semantischer Informationsinhalte vor. Da Programme
Transformationen von Information beschreiben, werden gr|~ere
Kenntnisse der Charakteristika von Information auch zu einem besseren Verst{ndnis der Software-Produktion f}hren.
Eine Analyse traditioneller Software-Maße zeigt deren grunds{tzliche Schw{chen auf. Ein m|glicher Ausweg k|nnte darin bestehen, vermehrt Erkenntnisse aus semantischen
Theorien der Programmiersprachen mit in die Betrachtungen einzuschließen.
Der hier vorgestellte Ansatz baut auf der denotationellen
Semantik f}r Programmiersprachen auf. ]berlegungen zum
Begriff der Information motivierendie Definition von speziellen semantischen Bereichen, den
Informationsbereichen. Die Grundidee ist, daß die Werte in
Informationsbereichen auf Niveaus liegen. Die Niveauh|he stellt intuitiv ein Maß f}r den Informationsinhalt eines
Wertes dar. Dies liefert erste Grundlagen f}r die Definition neuer Informationsma~e.
Dank Informationsbereichen ist es m|glich, eine neue abstrakte Interpretation vonProgrammen,
Informationsinformation genannt, zu formulieren. Erste
Beobachtungen legen die Frage nahe, ob die Menge an
Eingabeinformation und die Menge an Information, die im
Programmtext in Form von gebundenen Variablen und Konstanten enthalten ist, die Menge derjeweils maximal m|glichen semantischen Ausgabeinformation einer Programmausf}hrung beschr{nkt.

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Product Details

  • ISBN-13: 9783540551515
  • Publisher: Springer Berlin Heidelberg
  • Publication date: 5/27/1992
  • Language: German
  • Series: Informatik-Fachberichte Series , #299
  • Edition description: Softcover reprint of the original 1st ed. 1992
  • Edition number: 1
  • Pages: 106

Table of Contents

1 Einleitung.- 1.1 Thema und Ziele dieser Arbeit.- 1.2 Aufbau.- 2 Analyse des klassischen Ansatzes zur Software-Bewertung.- 2.1 Software-Maße.- 2.2 Drei konventionelle Software-Maße.- 2.3 Versuche, die Aussagekraft von Software-Maßen zu erhöhen.- 2.4 Eigener Ansatz.- 3 Methoden zur formalen Semantikbeschreibung.- 3.1 Syntax, Semantik und Pragmatik.- 3.2 Formale Semantikspezifikationsmethoden.- 3.2.1 Operationelle Semantik.- 3.2.2 Axiomatische Semantik.- 3.2.3 Algebraische Semantik.- 3.2.4 Natürliche Semantik.- 3.3 Denotationelle Semantik.- 3.4 Semantikbasierte Compiler-Erzeugung.- 4 Theorie der Informationsbereiche.- 4.1 Informationsbereiche.- 4.2 Produkt-Informationsbereiche.- 4.3 Summen-Informationsbereiche.- 4.4 Funktionen-Informationsbereiche.- 4.5 Folgen-Informationsbereiche.- 4.6 Reflexive Informationsbereiche.- 4.7 Denotationelle Semantik und Informationsbereiche.- 5 Programme als quantitative Informationstransformatoren.- 5.1 Vorzeichenaiialyse als Beispiel einer abstrakten Interpretation.- 5.2 Grundlagen zur Theorie der abstrakten Interpretation.- 5.3 Definition der neuen abstrakten Programminterpretation.- 5.4 Zusammenfassung.- 6 Möglichkeiten zur weiteren Entwicklung und Anwendung der Theorie.- 6.1 Ansätze zur Definition semantikbasierter Informationsmaße.- 6.2 Datentypen als Informationsbereiche.- 6.3 Die Frage nach der Existenz eines quantitativen Gesetzes für Transforma-tionen von Information mittels Computerprogrammen.- 7 Schlußbemerkungen.

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