How to write the data dictionary, Software Engineering

Assignment Help:

Write down the Data dictionary for the data item "Telephone Number".

Names: Telephone number

Aliases: none

Where to use /How to use: assess against set-up

Explanation

Telephone number = [local number| long distance number]

Local number = prefix + access number

Long distance number = 1 + area code + local number

Area code = [800 | 888 | 561]

Prefix = * a three digit number that never begins with 0 or 1*

 


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