Unlike for irrelevant_ Grammars1- S→XYZ ABB-→PQ|SZ➜as2- A→BAB|B| €B✈00 €Type 0Type 1Type 2Type3

As we know In TOC Grammar are the rules which defines the expressions. There are various grammars…

Answered: ke for irrelevant_

Engineering

Computer Science

ke for irrelevant_

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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Concept explainers

Data Dictionary

A database management system has an entity-relationship diagram, data dictionary, and data model as some of its key components, which are tools for the users who are managing the database. One of them is the data dictionary. The data dictionary can also be called metadata. By definition, metadata is a generic concept in the world of information and technology. An example of metadata could be meta-information about a media file or an image file, like author, location, last updated, size, etc. The contents of a data dictionary are names, attributes, and properties of main data elements which are captured during an experiment or stored in an information system, for example, databases. We can also call it a central repository of information about the main data.

Question

Unlike for irrelevant_

Grammars
1- S→XYZ AB
B-→PQ|S
Z➜as
2- A→BAB|B| €
B✈00 €
Type 0
Type 1
Type 2
Type3

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