How would you identify entity and relationship types from a user’s requirements specification?
What will be an ideal response?
One method of identifying entities is to examine the users’ requirements specification. From
this specification, we identify nouns or noun phrases that are mentioned (for example, staff
number, staff name, property number, property address, rent, number of rooms). We also look
for major objects such as people, places, or concepts of interest, excluding those nouns that are
merely qualities of other objects.
Having identified the entities, the next step is to identify all the relationships that exist
between these entities. When we identify entities, one method is to look for nouns in the users’
requirements specification. Again, we can use the grammar of the requirements specification
to identify relationships. Typically, relationships are indicated by verbs or verbal expressions.
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