PATTERNS OF DATA MODELING- P2 ppt
PATTERNS OF DATA MODELING- P3 pptx
... Modeling Notation 1
1.3 What Is a Pattern? 2
1.4 Why Are Patterns Important? 3
1.5 Drawbacks of Patterns 4
1.6 Pattern vs. Seed Model 4
1.7 Aspects of Pattern Technology 5
1.8 Chapter Summary 6
Bibliographic ... Summary 89
Bibliographic Notes 89
References 90
Chapter 7 Summary of Templates 91
Part II: Antipatterns 95
Chapter 8 Universal Antipatterns 97
8.1 Symmetric Relationship Ant...
PATTERNS OF DATA MODELING- P5 pptx
... chapter starts with a discussion of models and then introduces the topic of patterns.
1.1 What Is a Model?
A model is an abstraction of some aspect of a problem. Most software models are expressed
as ... combinations.
Patterns provide a higher level of building blocks than modeling primitives. Patterns are
prototypical model fragments that distill the knowledge of experts.
•...
PATTERNS OF DATA MODELING- P7 ppt
... the sequence of types in
the levels of the hierarchy.
• Simple tree. Restricts nodes to a single tree. Treats nodes the same. Use when tree de-
composition is merely a matter of data structure.
• ... context. Figure 2.11 shows an excerpt of this book’s file structure where I have kept
old copies of files from reviews. File names are unique within the context of their directory....
PATTERNS OF DATA MODELING- P15 pptx
... node name could also be invariant over time
(candidate key of nodeName alone). Note that the handling of time reflects a limitation of
relational DBMSs. It would be better to use time intervals ... Changing over Time Template 53
in a use of the template. A Node is a position within a directed graph. The distinction be-
tween parent and child causes the sense of direction that effect...
PATTERNS OF DATA MODELING- P18 pptx
... Nodes were important.
A UDG (undirected graph) is a set of nodes and a set of edges that connect nodes. You
need not show UDG in a use of the template. A Node is an entity type whose records ... cannot handle edges
that connect twice to the same node.
A UDG (undirected graph) is a set of nodes and a set of edges that connect nodes. (Note:
in an undirected graph all the nodes need no...
PATTERNS OF DATA MODELING- P23 ppt
...
Universal Antipatterns
An antipattern is a characterization of a common software flaw. When you find an antipat-
tern, substitute the correction. Universal antipatterns are antipatterns that ... UML diagram Use when Frequency
Item
description
Relates data and
metadata in the
same model.
The same model
relates data and
metadata.
Frequent
Homomor-
phism
Expresses an
analogy between...
PATTERNS OF DATA MODELING- P36 ppt
... of 2054.
•A MajorLanguage of English and long AbbreviationType yields a Phrase of “truck.”
•A MajorLanguage of French and long AbbreviationType yields a Phrase of “camion.”
•A MajorLanguage of ... AbbreviationType yields a Phrase of “trk.”
•A Dialect of British English and long AbbreviationType yields a Phrase of “lorry.”
In practice, many persons could populate data and d...
PATTERNS OF DATA MODELING- P37 pptx
... enter data
170 Chapter 13 / Softcoded Values
A SoftcodedVal ue is a piece of data for an Entity and has parallel fields for different data
types. A SoftcodedValue can have one of four data types—integer, ... softcoded values. The model combines data and
metadata. The top entity types shaded in gray (EntityType, Attribute, EnumValue) concern
metadata
. The bottom (Entity, Softcod...
PATTERNS OF DATA MODELING- P40 ppt
... data. Of course, writing the software was more dif-
ficult than with hardcoding and required skilled developers.
You should consider using softcoded values for an application with uncertain data ... volatile applications, softcoding adds stability to the data representation, minimizes
changes to application logic, and reduces the likelihood of data conversion. A softcoded
model is...
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