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**Mapping** **EER** **Model** **Constructs** **to Relations** . Copyright © 2011 Ramez Elmasri and Shamkant Navathe Relational Database Design by ER- and **EER**-to-Relational **Mapping**

**Mapping** **EER** **Model** **Constructs** **to Relations**

13 **Mapping** **EER** **Model** **Constructs** **to Relations** (contd.) **Mapping** of Shared Subclasses (Multiple Inheritance) A shared subclass, such as STUDENT_ASSISTANT, is a

**Mapping** **EER** **Model** **Constructs** **to Relations**. Relational Database Design by ER- and **EER**-to-Relational **Mapping**

**Mapping** **EER** **Model** **Constructs** **to Relations** |**Mapping** of Shared Subclasses (Multiple Inheritance) A shared subclass, such as STUDENT_ASSISTANT, is a subclass of several classes, indicating multiple inheritance. These classes must all

**Mapping** **EER** **Model** **Constructs** **to Relations**

**Mapping** **EER** **Model** **Constructs** **to Relations** yStep 9: **Mapping** of Shared Subclasses A shared subclass is a subclass of several classes A shared subclass is a subclass of several classes, indicating multiple inheritance These . classes

7 Agenda Sets **Relations** and tables Relational schema Primary keys Relational Database Design Using ER-to-Relational **Mapping** **Mapping** **EER** **Model** **Constructs** **to Relations**

**Mapping** **EER** **Model** **Constructs** **to Relations**

**Mapping** **EER** **Model** **Constructs** **to Relations**

Seven-step algorithm to convert the basic ER **model** **constructs** into **relations** ! Additional steps for **EER** **model** SE487: ... 286 Chapter 9 Relational Database Design by ER- and **EER**-to-Relational **Mapping** 9.1 Relational Database Design Using

(**EER**) **model** extended from the traditional Entity Relationship ... one [Codd79]. The ER **model** lacked **modeling** **constructs** like specialization (or generalization) ... This **model** and its **mapping** (as per the algorithm given by Elmasri and Navathe [Elmasri04])

**Mapping** **EER** **Model** **Constructs** **to Relations**

**Mapping** **EER** **Model** **Constructs** **to Relations** . ให้นักศึกษาทำการ **Mapping** **EER** **Model** **Constructs** **to Relations** ...

**Mapping** **EER** **Model** **Constructs** **to Relations** . ให้นักศึกษาทำการ **Mapping** **EER** **Model** **Constructs** **to Relations** ...

The reader is assumed to be familiar with that **model**. The **modeling** **constructs** of the TIMEER ... specifying superclass/subclass **relations**. The syntax is as in the **EER** **model**. ... in TIMEER is similar to the syntax in the **EER** **model**, and the **mapping** we present resembles the **mapping** from the ...

TRANSFORMATION OF THE **EER** **MODEL** **TO RELATIONS** (STEP 2) 3.1 Transformation Rules 3.2 ... categorization of extended ER **constructs** and a set of **mapping** rules, ... the transformation of all types **of EER** **constructs** **to relations**.

(**EER**) **Model** 101. 4.1 Subclasses, Superclasses, and Inheritance 101 4.2 Specialization and Generalization 104 ... 7.2 **Mapping** **EER** **Model** **Constructs** **to Relations** 226 7.3 Summary 230 Review Questions 230 Exercises 231 Laboratory Exercises 232

7.2 **Mapping** **EER** **Model** **Constructs** **to Relations**. 7.3 Summary. Chapter 12 - Practical Database Design Methodology and Use of UML Diagrams. 12.1 The Role of Information Systems in Organizations. 12.2 The Database Design and Implementation Process.

... but the **EER** **constructs** and their semantics are retained, ... Abbreviation Used for Temporal Support for E-**Relations** **Mapping** of Weak Entity Types ... and the **mapping** we present resembles the **mapping** from the **EER** **model** to the relational **model** presented in [7].

Discuss the correspondences between the ER **model** **constructs** and the ... Discuss the options for **mapping** EERmodel **constructs** **to relations**. 7.3. Try to **map** the relational schema of Figure 6.12 into an ER schema. This is part of a ... **EER** diagram notation to represent subclasses and ...

What are the important factors that need to be considered to **model** a system from different views? 5. Describe the following with respect to class diagrams: a. ... Describe the **Mapping** **of EER** **Model** **Constructs** **to Relations**. 4. Describe the following concepts with respect to file organization:

Ordered Pairs, **Relations** & Functions Ordered Pairs, Equality of Ordered Pairs, ... Summary of **Mapping** for **Model** **Constructs** and Constraints **Mapping** **EER** **Model** Concepts **to Relations**, Query, Processing and Optimization, Query Processing, Query Optimization, Database Tuning.

Relational database design using ER -to-Relational **mapping**; **mapping** **EER** **model** **constructs** **to relations**. 7. Functional Dependencies And Norm alization For Relational Databases: Informal design guidelines for relational schemas; functional dependencies; ...

of ER **constructs** into **relations** which can be normalized later. Numerous ... The connectivity of a relationship specifies the **mapping** of the associated entity ... **model**. A taxonomy **of EER** **constructs** was defined, ...

ER-to-Relational **Mapping** Algorithm, **Mapping** **EER** **Model** **Constructs** **to Relations**. 8. Disk Storage Devices, Files of Records, Operations on Files, Unordered Files, Ordered Files, Hashed Files, Types of Single-level Ordered Indexes, 9.

We have selected the **EER** **model** because of its widespread use in designing relational databases [19]. ... structures using relational **constructs**. 2.1 Relational Concepts. ... The **mapping** **of EER** schema.5 into relational

ported inter-**model** assertions between **EER**, UML, and, now, ORM **models** and ... **model** checking, compute derived **relations**, and classiﬁcation. Conversely, ... 23. Keet, C.M. **Mapping** the Object-Role **Modeling** language ORM2 into Description

... the temporal **EER** **model** ERV T is brieﬂy introduced. ERV T ... hZ,<i or hN,<i. Thus, a temporal database can be regarded as a **mapping** from time points in T to standard ... [7, 4]). For the temporal **constructs** we have: 2The snapshot **model** represents the same class of temporal databases as ...

Fuzzy **EER** **Model**: Enhance entity-relationship **model** ... **constructs** and the ways to define the membership functions ... It introduces a similarity **relations** based **model** to handle fuzziness at three levels: attribute level, object/class

... in turn, is a limiting factor of **mapping** and transformation algorithms for CASE tools to let one work in parallel on ... **constructs**, and cardinality constraints. ... develop a conceptual **model** of all possible entities and their **relations** in the se-

... **EER** **model**, data exchange 1 Introduction ... deﬁned a presumably reversible **mapping** between DTDs and relational database systems is [13]. ... to the additional **modeling** **constructs** of the enhanced ER **model** (**EER** **model**) was presented.

... the concepts and **relations** must be well-typed. The **model**-theoretic semantics of DLR is speciﬁed through the ... comparing the language **constructs** of ER, **EER**, UML class diagrams, ORM, and ORM2 has become ... 30. Keet, C.M. **Mapping** the Object-Role **Modeling** language ORM2 into Description

... (OPM) is the result of incorporating **constructs** for **modeling** scientific experiments (protocols ... such as the **Extended Entity-Relationship** (**EER**) **model**, the relational **model**, and the ASN.1 data ... relational database definition entails **mapping** every OPM object or protocol class C into a ...

**constructs** (entities and relationships) ... The **mapping** rules of the Chen **model** to a relational database ... The first two **relations**, MALL–Store and MALL are the same as they were in Chapter 2: **Relations** for the STORE Entity

... . disj;cover are binary **relations** over 2EE , describing disjointness and covering partitions ... is a tree **model**, and for each U 2Uits **mapping** is a global and functional role, then there is bijective **mapping** between ... fragments of the **EER** **model** for which temporal extensions are ...

Object Role **Model** (ORM) is a data **modeling** technique ... and understandable approach for **mapping** the ORM2 **constructs** to SROIQ DL syntax. ... SROIQ still lacks the capability of **mapping** primary keys and n-ary **relations** where n > 2.

elling formalisms, **extended entity relationship** (**EER**) **model**, has proved to be a precise and ... abstraction of **constructs** that it includes. Although the original ER **model** was proposed by Chen (1976), many extensions ... the number of **relations** can participate in other **relation**-ships as in ...

... composite attributes in **EER**; **relations**, classes and ... The **EER** **model** deﬁnes a primary key constraint on the SSn attribute. Therefore, a ... **constructs** and the **mapping** rules Rfor the respective metamodel.

... (**EER**) **model**. [15][18] Even though the **EER** **models** could capture simple molecular biological relationships, to **model** **constructs** such as ordered relationships, functional processes and 3D ... It is a collection of **relations** which resembles a table of values or a flat file ...

ER- and **EER**-to-Relational **Mapping** Copyright © 2004 Pearson Education, Inc. Chapter 7-2 ... Example: We create the **relations** EMPLOYEE, DEPARTMENT, and ... Summary of **Mapping** **constructs** and constraints.

The most important **modeling** **constructs** incorporated in the **EER** **model** is supertype/subtype relationships. ... The process of **mapping** such a relationship **to relations** requires two steps: first, two **relations** are created, one for each of the participating entity types.

Their tool was designed to **map** the **EER** and UML **modeling** techniques to DLR and DLRifd description logics. In (2004) R. Colomb ... of rules for **mapping** ORM2 **constructs** to its equivalent OWL2 syntax. ... of **mapping** primary keys and n-ary **relations** where n > 2.

**mapping** **constructs** from a metamodel A to a metamodel B, ... relationship between these **constructs**. But these **relations** can only be discovered once we know the relationship between their respective ... Dignum, V.: A **Model** for Organizational Interaction: Based on Agents, Founded in ...

What are the main reasons for introducing the concepts of superclasses and subclasses into an **EER** **model**? ... and the addition of new **constructs** to make the language computationally ... • **Mapping** and transformation The service should be able to handle replication across different DBMSs and ...

ERM-Tutor, which teaches **mapping** conceptual database schemas into relational ones [6], ... Extra **constructs** Missing **constructs** ... Our next step is to incorporate the **model** into both **EER**-Tutor and ERM-Tutor.

include number theory, sets, **relations** and functions, logic, graphs and trees, matrices, ... Structural constraints, problems with ER **model**. **EER** **model** - specialization or generalization, aggregation and ... predícate logic and covers various Prolog programming **constructs** such as loops, ...

This paper proposes a stepwise approach to query translation that **constructs** a gateway between relational and XML database systems. ... **relations** R1(A1, A3) and R2(A2, A4, *A1) with an FD (functional dependency): ... augmented view of the **EER** **model** of target RDB schema as shown in Figure 4(b).

... Participation, Cardinality Constraints, Multiple Relationships, Keys, Weak Entity Sets, **EER**- **model**, Specialization and Generalization ... Relational Data **Model** : **Relations**, What is **Relation** ... Partial Order, Theorem, Functions (**Mapping**), Types of **Mapping**, Other Specific Mappings ...

OSI **Model**: **Model**, Functions of layers, ... **Mapping** **EER** **Model** Concepts **to Relations**, SQL99-Schema Definition ... Data types, Variables, Constants, Strings, Operators, Conditional statements and looping **constructs**, Arrays. PHP functions (with parameters, functions returning values). UNIT IV ...