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Strength of Assertions in <strong>Models</strong> ► Saying that a relation is ■ A list: very strong assertion, <strong>to</strong>tal order! ■ A tree: still a strong assertion: hierarchies possible, easy <strong>to</strong> think ■ A dag: still layering possible, still a partial order ■ A graph: hopefully, some structuring or analysis is possible. Otherwise, it’s the worst case ► And those propositions hold for every kind of diagram in Software Engineering! ► Try <strong>to</strong> achieve dags, trees, or lists in your specifications, models, and designs ■ Systems will be easier, more efficient Prof. Uwe Aßmann, Softwaretechnologie II 32
Structuring Improves Worst Case List: strong assertion: <strong>to</strong>tal order Tree: still abstraction possible Dag: still layering possible Structured graph <strong>Graph</strong> with analyzed features <strong>Graph</strong>: the worst case Sequential Hierarchies Partial order Layered Structured Unstructured Unstructured Ease of Understanding Prof. Uwe Aßmann, Softwaretechnologie II 33
Page 1 and 2: How to</st
Page 3 and 4: Obligatory Reading
Page 5 and 6: Goals ► Understand that software
Page 7 and 8: The Problem: How <
Page 9 and 10: Partially Collapsed Prof. Uwe Aßma
Page 11 and 12: Requirements for Modelling in Requi
Page 13 and 14: Example: Rename Refacto</st
Page 15 and 16: Refactoring on Def
Page 17 and 18: Data-Flow Graphs
Page 19 and 20: Precise Call Graph
Page 21 and 22: Types of Graphs in
Page 23 and 24: Definitions ► Fan-in ■ In-degre
Page 25 and 26: Trees ► One source (root) ► Man
Page 27 and 28: Directed Graphs (D
Page 29 and 30: Reducible Graphs (
Page 31: Strength of Assertions in M
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 and 78: Second Idea ► Analyze</st
Page 79 and 80: Example 2: Consistency Checking of
Page 81 and 82: Second Idea ► Write queries that
Page 83 and 84:
Example 3: UML Specifications in So
Page 85 and 86:
Answer Alternative category text Ex
Page 87 and 88:
Third Idea: Use Onto</stron
Page 89:
The End Softwaretechnologie II, ©
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