Introduce specialization/generalization concepts into the ER model shown in Figure 13.11 and described in Exercise 12.13 to show the following:
(a) The majority of parking spaces are under cover and each can be allocated for use by a
member of staff for a monthly rate.
(b) Parking spaces that are not under cover are free to use and each can be allocated for use
by a member of staff.
(c) Up to twenty covered parking spaces are available for use by visitors to the company.
However, only members of staff are able to book out a space for the day of the visit. There is no charge for this type of booking, but the member of staff must provide the visitor’s vehicle
license number.
This figure takes the original Figure 13.11 and adds the additional requirements described
above (a) to (c) using enhanced EER concepts.
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a. are set using the x and y attributes b. are set using the width and height attributes c. must be set to the actual size of the image d. are automatically adjusted by the browser to fit in the space allotted
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A. SquareRt(x) B. SqRoot(x) C. SquareRoot(x) D. Sqrt(x)