PATTERNS OF DATA MODELING- P3 pptx
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- 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- 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- P51 pptx
... intent.
role one end of a relationship.
scenario the execution of a state diagram for an entity of the state diagram’s entity type.
schema the structure of the data in a database.
seed model ... end.
referential integrity a database mechanism that ensures that data references really exist
and that there are no dangling foreign keys.
relational database a database in which the dat...
THE FRACTAL STRUCTURE OF DATA REFERENCE- P3 pptx
... power of a
memory hierarchy comes from its ability to take advantage of patterns of data
use that are transient. Repeated requests tend to be made to a given data item
over a short period of ... importance of self
-
similar phenomena in describing the opera
-
tional behavior of computer systems, however, this preface is perhaps the place
to admit that the demonstration...
PATTERNS OF DATA MODELING- P4 pdf
... expertly building data models.
This book focuses on databases and not on programming, because most commercial
software is built around a database. The database representation (the data model) sets ... scope, and set the
xiv Preface
key abstractions in the software. These tasks revolve around models and often data mod-
els. The skillful use of patterns is intrinsic to building qualit...
PATTERNS OF DATA MODELING- P6 potx
... Software Architecture: A System of Patterns. Chichester, United Kingdom:
Wiley, 1996.
[Chen-1976] PPS Chen. The entity-relationship model—toward a unified view of data. ACM Transac-
tions on Database ... Vlissides. Design Patterns: El-
ements of Reusable Object-Oriented Software. Boston, Massachusetts: Addison-Wesley, 1995.
[Hay-1996] David C. Hay. Data Model Patterns: Conventions...
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