AboutPhilip Lafeber Expertise I have been specialising in knowledge analysis and modelling. I have an interest in the way models of programs, architectures, business processes and the like are properly made and analysed. What`s meant by `properly` depends on the goal you`re trying to achieve. The analysis of this goal and the way it can best be realised is something you might want to ask me about.
Experience
Past/Present clients University of Amsterdam, Bolesian, Canon europa, Solveware, NetlinQ
I would appreciate some help with the following question, I have done it myself, but I'm not sure its correct:
Draw the following relationships: a) An art gallery schedules one or more exhibits; a particular exhibit is scheduled for only one art gallery; b) An exhibit may involve the artwork of many artists; an artist's artwork may be exhibited at one or more art galleries, or may not be exhibited; c) For each exhibit there is one director; a director may direct one exhibit in a given art gallery, or may not direct any exhibits. Indicate minimum and maximum cardinalities, degree and optional/mandatory nature of each relationship.
This is what I came up with:
1 0 or M
Art ------------ Exhibits ---------- Artwork
Gallery 1 or M | 1 or M
|
| 0 or 1
1 |
Director --------|
Entities:
Art Gallery, Exhibits, Artwork, Director
1. Would artwork be an entity?
2. Are all the relationships shown correctly?
3. Any entities I missed (eg. associative)?
4. Is this correct overall?
5. I know what cardinaltiy and optional/mandatory nature of relation are, but what is degree?
Any help would be greatly appreciated. Thanks.
Answer Hello,
Thank you for your question. I apologise for replying so late. I was not available earlier.
Your start is correct; creating an overview of the important items in the project description, and linking them together. From what you wrote, I am not able to see if it is correct. But from what I can see, it looks right. I would also like to ask if you can check that ALL items that play a role in this project were represented in your diagram. I think I am missing one. Just find all nouns in the text and decide whether they are particular for this topic.
