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Third Idea: Use On<strong>to</strong>logy Language ► OWL (description logic) can be used for consistency constraints, also of car specifications ■ Result: an on<strong>to</strong>logy, a vocabulary of classes with consistency constraints ■ OWL engines (RACER, Triple) can evaluate the consistency of car specifications ■ On<strong>to</strong>logies can formulate consistency criteria for an entire supplier chain [Aßmann2005] Prof. Uwe Aßmann, Softwaretechnologie II 78
Example 2: Consistency Checking of Tax Declarations ► Task: you have been hired by the tax authorities. Write a program that checks the income task declarations on consistency ► Represent the tax declarations with graphs. ■ <strong>How</strong> many graphs will you get? ■ <strong>How</strong> big are they? ■ <strong>How</strong> much memory do you need at least? Prof. Uwe Aßmann, Softwaretechnologie II 79
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How to</st
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Obligatory Reading
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Goals ► Understand that software
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The Problem: How <
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Partially Collapsed Prof. Uwe Aßma
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Requirements for Modelling in Requi
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Example: Rename Refacto</st
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Refactoring on Def
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Data-Flow Graphs
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Precise Call Graph
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Types of Graphs in
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Definitions ► Fan-in ■ In-degre
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Trees ► One source (root) ► Man
Page 27 and 28: Directed Graphs (D
Page 29 and 30: Reducible Graphs (
Page 31 and 32: Strength of Assertions in M
Page 33 and 34: Structuring Improves Worst Case Lis
Page 35 and 36: Methods and Tools for Analysis of <
Page 37 and 38: Graphs and Fact Da
Page 39 and 40: Queries on Graphs
Page 41 and 42: Layering of Systems ► To be compr
Page 43 and 44: Pattern and Rules ► Parenthood ca
Page 45 and 46: Same Generation ► Beyond sisters
Page 47 and 48: Same Generation Introduces Layers
Page 49 and 50: Searching Graphs -
Page 51 and 52: Same Generation Datalog Program isP
Page 53 and 54: Description Logic (DL) ► Is a spe
Page 55 and 56: Application Areas of Datalog, DL, O
Page 57 and 58: Answer Alternative category text Ex
Page 59 and 60: Example: Web Queries with Logic ►
Page 61 and 62: Who is Descendant of Whom? ► Some
Page 63 and 64: Impact of Basic Rule GustavAdolf Ad
Page 65 and 66: [S|M][S|M]PP Path Problems: Variant
Page 67 and 68: Exercise: Railway Routes ► Base (
Page 69 and 70: Central Theorem of Datalog/DL/EARS
Page 71 and 72: Applications of Graph</stro
Page 73 and 74: Generic Datalog Queries ► Transit
Page 75 and 76: Example 1: Consistency Checking for
Page 77: Second Idea ► Analyze</st
Page 81 and 82: Second Idea ► Write queries that
Page 83 and 84: Example 3: UML Specifications in So
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Page 87 and 88: Third Idea: Use Onto</stron
Page 89: The End Softwaretechnologie II, ©
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