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Which of these are three components in an entity relationship model



Library and Information Science Questions Answers Quizzes (LIS Quiz)




QUESTION

Which of these are three components in an entity relationship model


OPTIONS

(a) Attributes

(b) Identifiers

(c) Entities

(d) Relationships


ANSWER 

(a) Attributes

(c) Entities

(d) Relationships







Attributes, Entities, and Relationships are three components in an entity-relationship model 







An entity–relationship model (or ER model) describes interrelated things of interest in a specific domain of knowledge. A basic ER model is composed of entity types (which classify the things of interest) and specifies relationships that can exist between entities (instances of those entity types).



An ER database contains data about entities and their relationships. Entities and relationships are qualified by attributes representing their descriptive properties. Similar entities, that is entities of the same type, are classified in entity-sets. For instance, PERSON denotes the entities of an entity-set with attributes NAME and AGE, while ASSIGNED denotes the relationships between the entities of entity-sets PERSON and PROJECT.



Functional Requirements for Bibliographic Records (FRBR /ˈfɜːrbər/) is a conceptual entity-relationship model developed by the International Federation of Library Associations and Institutions (IFLA) that relates user tasks of retrieval and access in online library catalogs and bibliographic databases from a user’s perspective. It represents a more holistic approach to retrieval and access as the relationships between the entities provide links to navigate through the hierarchy of relationships. The model is significant because it is separate from specific cataloging standards such as Anglo-American Cataloguing Rules (AACR) or International Standard Bibliographic Description (ISBD).






SEE ALSO



REFERENCES


1. Library of Congress, "FRBR Terminology Quiz," http://www.loc.gov/catworkshop/RDA%20training%20materials/LC%20RDA%20Training/Captivate-FRBR%20Quiz%201/FRBR%20Quiz%201-Captivate.htm (accessed February 10, 2019).




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