Not so sure here. From analysis point of view yes, but from a design stand point not so sure ...
A Student might enroll for a class or have a period of registration for a degree or a set of classes. The pink moment-interval would be the PeriodOfRegistration or Enrollment.
In a domain you might find for whatever reason there is a 1:1 relationship between Person, Student and Registration, Course Period and Course.
Take for instance people registering for your courses. You might be interested in simply managing students of a course, not tracking registrations of the same student to different courses.
So here Person, Student and Registration will collapse into one class. You have to make a choice between Student and Registration
The same goes to Course and Course Period.
So you end up with an association between a Role and a Thing (If the choice was for Student and Course).
So given this new information Student is pink or is yellow? I would say it is both yet it defaults to yellow. Furthermore in code I would make it explicit that Student absorbed the concept of Registration and Person by the means of interface,
class Student : IPerson, IRegistration .,,,,
So yes, it true that Student is Yellow yet (IRegistration) Student) is pink and ((IPerson) Student) is green.
Hi everyone!:) Having some experience in modeling, though limited in color modeling I have a question which seems typical for me: (At least for me) it seems...
You are correct. Colors are defined by the relationship of the object with others ... collaborations. Yet there is usually a color that is dominant. If there...
Thanks for your reply:) As you adviced I ran through the "Choosing your Model Context Strategy" chapter. Just to make sure I understand your thoughts: do you...
... Yes. ... Yes. In a particular context there is a dominant color. If the dominant color of the concept of student is Pink (Moment-Interval) probably for ...
You might be interested in another related discussion on the featuredrivendevelopment.com website if you've not looked there already. Color may indeed change...
Thanks for your reply! Just to make sure, do you mean the "DNC and the Moment-Interval Archetype" thread? I've searched through the forum for the "archetype"...
It's great to see some traffic on this list. :-) Student is a role played by a person - correct. It is never a moment-interval. A Student might enroll for a...
Thank you for your answer!:) Regarding the student question... When you refer to the term "student" do you mean the general term (the student role!) or a...
In David's example there would be three classes on the diagram: a Person (green), a Student (yellow), and an Enrollment (pink). In your later example, the...
Hi Gyula, ... I suggest you to have a look at the Event Sourcing pattern to capture events from the mobile system. ... I understand the need to preserve older...
I'm not authorized to go into details, so I try other but similar samples. 1. Say you have a weather forecasting company. You run a central system which stores...
Hi Gyula ... I would say you need both the data and the rules lead to such decision. ... If it is functional business requirement belongs to analysis as much ...
Yes! It makes sense:) Storing events (eg. the changes, the deltas) is a nifty approach. I think this approach also relates to non-functional apsects of the...
... True. But you can use rolling snapshots. But the question is how many times you need to dig in to the far past to find justifications for a business...
The rolling snapshot is a nifty idea:) Regarding the banking example I see your opinion (at least I think so). Processing operative data (actual rules) and...
Hi For brief introduction to historic values and snapshots see http://www.step-10.com/SoftwareDesign/ModellingInColour/HistoricValues.html For a brief...
I'm going out in the limb here. There are far more proficient people reading this list then me so they may correct me any time. Price is usually a value object...
Hi Nuno -- Try starting with Product (description), in blue of course, rather than a (thing). That description may include certain "fixed" value attributes...
PS, Nuno -- I just saw Palmer's message... [Date: Oct 28, 2009 10:40 AM] Start with his first link, on "Historic Values" ...and keep reading. Steve -- you...
Thanks for the input Ken. ... It depends on the domain. In a warehouse all products have an SKU so product is this context is a thing. Yet for cataloguing, UPC...
Hi David, ... Agreed, ... Not so sure here. From analysis point of view yes, but from a design stand point not so sure ... ... In a domain you might find for...
Nuno, I can't disagree with your post. You are clearly very good at color modeling. However, I would caution against mixing implementation detail with...
... Agreed. That is the beauty of DNC and SOM Patterns. They help discovering the domain to great detail, not leaving one rock unturned. ... I'm very...
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