2. NOTATION
T-Form ER Data Modeling
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3. Notation
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T-form ER Data Modeling incorplated the notation of the Superset/Subsets.
Superset
Header
Details
4. Notation
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Header and Details
Superset
(Entity Name here)
Header
Details
5. Notation
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Superset
Subset
Subset
Superset / Subset
Superset
Classification
Subset
Subset
The Superset subsets of Diference
The Superset Subset of isomorphic
Classification
9. Notation
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RESOURCE VIRTUAL ENTITY
EVENT VIRTUAL ENTITY
Virtual Entity
10. Notation
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RESOURCE ENTITY ROLE
EVENT ENTITY ROLE
Entity Role
11. Notation
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0 or 1 From1 to Many
Cardinality Constraints
The Symbols of cardinality Constraints
12. Notation
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Entity Name
Identifier
Reuse_1(R)
Reuse_2(R)
・
・
・
Reuse_n(R)
Attribute_1
Attribute_2
・
・
・
Attribute_n
EntityType
The position of denotes
13. Notation
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E: EVENT
R: RESOURCE
VE: VURTUAL ENTITY
ER: ENTITY ROLE
TS: QUASI ENTITY
ML: MAPPING LIST
Credit Check
CreditCheckRequestNo.
CustomerNo.(R)
Customer_Name
Request_Date
Credit_Limit_AMT
・
・
・
E
The position of the denotes
14. Notation
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Identifier
Among the data items that
are included in an
observation entities , which
corresponds to the identifie
Reuse(R)
Individual
indicator(Identifier) of other
entities is equivalent to this .
Reuse is inserted by the
occurrence of Relationship.
Identifier and Reuse
Entity Name
Identifier
Reuse_1(R)
Reuse_2(R)
・
・
・
Reuse_n(R)
Attribute_1
Attribute_2
・
・
・
Attribute_n
EntityType
15. Notation
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Attrributes
Which corresponds to the
data items that are included
in an observation target
entity
Date and Timestamp
Text and description
Value
Derivation
Boolean
Binary Data
Others and Copy from
other Entities
Credit Check
CreditCheckRequestNo.
CustomerNo.(R)
Customer_Name
Request_Date
Credit_Limit_AMT
・
・
・
E
The Attributes
16. A Examples of “QUASI EVENT”
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Pref.ID. Pref_Name CityID. City_Name Ward_ID Ward_Name
Pref City Ward
Pref・City・Ward・QE
PrefID(R)
CityID(R)
WardID(R)
Pref_Name(d)
City_Name(d)
Ward_Name(d)
Pref・City・QE
PrefID(R)
CityID(R)
City・Ward・QE
CityID(R)
WardID(R)
R R R
TS TS
TS
17. A Examples of “QUASI EVENT”_(cont.)
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Pref.ID. Pref_Name CityID. City_Name Ward_ID Ward_Name
Pref City Ward
Pref・City・Ward・QE
PrefID(R)
CityID(R)
WardID(R)
Pref_Name(d)
City_Name(d)
Ward_Name(d)
Pref・City・QE
PrefID(R)
CityID(R)
R R R
TS
TS
18. 商談DTL
A Example of Entities
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商談
商談HDR
商談No.
H_Rev.No.
リードNo.(R)
商談日
予算
案件化予
定日
要望総額
(D)
対応時間
商談明細No
D_Rev.No...
商談No.(R)
H_revNo.(R)
品番(R)
商談詳細
メモ
要望金額
要望数量
希望納期
リード
リードNo. 氏名
職位
所属部署
(d)
商談品目
品番 商談許可
期日
品名
説明
提供価格
決定方式
メモ
R
R
E
E
19. The Notation rules for Event -based Entity
1. The Event -based Entity inherit the identifier of the Resource
-based Entity by the Relationship as Reuse.
2. When a relationship is drawn to the event from the event ,
inheritance destination is to inherit the identifier of the
original side
3. However , if the relationship of the original side of the
cardinality constraint of "n", the new correspondence table
“Mapping List” is generated .
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20. The Notation rules for Event -based Entity
1. It’s not an Event -based Entity to Entity
The Entities other than the Event -based Entity that has the Identifier
is a Resource -based Entities
2. The relationships between Resource -based Entity , the
Quasi-Event occurs.
It ‘s not affected by the cardinality constraint.
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