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Based on this EER diagram, which of the following statements are incorrect?  a. A collection may include no article b. An author may not write a book or contribute in an article c. A book or article must have an author d. An article may be part of more than one collection

Based on this EER diagram, which of the following statements are incorrect?  a. A collection may include no article b. An author may not write a book or contribute in an article c. A book or article must have an author d. An article may be part of more than one collection

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Based on this EER diagram, which of the following statements are incorrect? 

a. A collection may include no article

b. An author may not write a book or contribute in an article

c. A book or article must have an author

d. An article may be part of more than one collection

### Entity-Relationship (ER) Diagram for a Publication Database #### Description This ER diagram represents a database schema for managing publications, including books, articles, collections, and editors. The main entities, their attributes, and the relationships between these entities are detailed below. #### Entities and Their Attributes: 1. **Publication**: - **Attributes**: - ISBN - Publication Title - Year 2. **Book**: - **Attributes**: - Edition 3. **Collection**: - **Attributes**: - Volume 4. **Article**: - **Attributes**: - Title - Pages 5. **Editor**: - **Attributes**: - Name - Publish 6. **Author**: - **Attributes**: - Name #### Relationships: 1. **Edit**: - **Entities Involved**: Publication and Editor - **Attributes**: Start Date, End Date - **Cardinality**: Many (M) Publications can be edited by one (1) Editor. An Editor can edit many (N) Publications. 2. **Part of**: - **Entities Involved**: Collection and Article - **Cardinality**: One (1) Collection can have many (N) Articles. An Article is part of one (1) Collection. 3. **Write**: - **Entities Involved**: Book and Author - **Cardinality**: An Author can write many (N) Books. A Book is written by one (1) Author. 4. **Contribute**: - **Entities Involved**: Author and Article - **Cardinality**: Many (M) Authors can contribute to many (N) Articles. The diagram visually represents entities with rectangular boxes, attributes with ellipses connected to their corresponding entities, and relationships with diamonds connecting related entities. #### Detailed Diagram Analysis: - The **Publication** entity is central, connected to both **Book** and **Collection** entities using a generalization/specialization relationship (denoted by "d" inside a circle). - The **Edit** relationship shows that each publication may be associated with a specific editor over a defined period. - **Books** and **Articles** have their unique attributes, such as edition for books and title/pages for articles. - **Collections** consist of volumes and
Transcribed Image Text:### Entity-Relationship (ER) Diagram for a Publication Database #### Description This ER diagram represents a database schema for managing publications, including books, articles, collections, and editors. The main entities, their attributes, and the relationships between these entities are detailed below. #### Entities and Their Attributes: 1. **Publication**: - **Attributes**: - ISBN - Publication Title - Year 2. **Book**: - **Attributes**: - Edition 3. **Collection**: - **Attributes**: - Volume 4. **Article**: - **Attributes**: - Title - Pages 5. **Editor**: - **Attributes**: - Name - Publish 6. **Author**: - **Attributes**: - Name #### Relationships: 1. **Edit**: - **Entities Involved**: Publication and Editor - **Attributes**: Start Date, End Date - **Cardinality**: Many (M) Publications can be edited by one (1) Editor. An Editor can edit many (N) Publications. 2. **Part of**: - **Entities Involved**: Collection and Article - **Cardinality**: One (1) Collection can have many (N) Articles. An Article is part of one (1) Collection. 3. **Write**: - **Entities Involved**: Book and Author - **Cardinality**: An Author can write many (N) Books. A Book is written by one (1) Author. 4. **Contribute**: - **Entities Involved**: Author and Article - **Cardinality**: Many (M) Authors can contribute to many (N) Articles. The diagram visually represents entities with rectangular boxes, attributes with ellipses connected to their corresponding entities, and relationships with diamonds connecting related entities. #### Detailed Diagram Analysis: - The **Publication** entity is central, connected to both **Book** and **Collection** entities using a generalization/specialization relationship (denoted by "d" inside a circle). - The **Edit** relationship shows that each publication may be associated with a specific editor over a defined period. - **Books** and **Articles** have their unique attributes, such as edition for books and title/pages for articles. - **Collections** consist of volumes and
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