PATTERNS OF DATA MODELING- P19 potx
PATTERNS OF DATA MODELING- P19 potx
... background for data and a light gray for metadata.
The item description template is useful if you cannot fully describe data as software is
being developed. The template lets you enter data and its ... Item description: UML template. Use when the same model
relates data and metadata.
ItemDescription Item
Characterization Metadata Data
Flexibility General purpose Specific
Volatility...
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...
PATTERNS OF DATA MODELING- P8 potx
... branch nodes. A Tree is a hierarchy of nodes and has one node as the root.
A particular node may, or may not, be the root. You need not show Tree in a use of the tem-
plate.
A Node is either ... nodes each of which, in turn, can be a leaf node or a further branch node.
Figure 2.18 adds the constraint that a tree cannot have any cycles. (See Section 2.2.1 for
an explanation of cycles.)...
PATTERNS OF DATA MODELING- P10 potx
... a person can be manager of one group and an acting manager of another group. The
same person may be an individual contributor and a manager during different portions of a
Figure 2.36 Tree changing ... differ from that of its various positions.
A Tree is a hierarchy of nodes and has one node as the root. A Node is a position within
a Tree. An Entity is something with identity and da...
PATTERNS OF DATA MODELING- P13 potx
... (directed graph) is a set of nodes and a set of directed edges that connect nodes.
(Note: in a directed graph all nodes do not have to be connected.) You need not show DG in
a use of the template. A ... represented via the coupling between nodes. The populated tables use different
data than Figure 3.1 because the premise of the template is a tree that is generalized to having
multip...
PATTERNS OF DATA MODELING- P34 potx
... acquisitions that cause databases to be merged. For example, the merger of Delta
Airlines and Northwest Airlines created a need to merge frequent flyer databases.
The tricky part of merging data is determining ...
entities remain in the
database. Gradually
migrate data to the
active entity.
• Eventually con-
solidates the data.
• There is less risk
of stale references
as obso...
PATTERNS OF DATA MODELING- P42 potx
... relational database tables for the equipment example at the
start of the chapter (Figure 14.2).
Figure 14.13 Diagram type subject area: UML model. The kind of model
construct determines the kind of ... Area
Figure 14.13 and Figure 14.14 determine the kind of diagram construct from the Diagram-
Type and kind of model construct. For example, the combination of a DiagramType and an...
PATTERNS OF DATA MODELING- P49 potx
... unified view of data. ACM Transac-
tions on Database Systems 1, 1 (March 1976).
[Hoberman-2010] Steve Hoberman. Data Modeling Made Simple: A Practical Guide for Business and
IT Professionals, ... Explanation of the IDEF1X Notation
The IDEF1X literature often uses the term “cardinality” incorrectly, instead of the prop-
er term “multiplicity.” Multiplicity is a constraint on the size...
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...
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