Consider the e r diagram in figure 8 25 on page 289

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Consider the E-R diagram in Figure 8-25 on page 289. Are all three relationships: Holds , Goes On , and Transports necessary (i.e., can one of these be deduced from the other two)? Are there reasonable assumptions that make all three relationships necessary? If so, what are these assumptions? You will need to use the cardinality of the relationships to answer this question, i.e., in your answer.
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WBIT 3110, Summer 2015, Unit 3 HW B 9

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