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domaindrivendesign · Domain-Driven Design

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  • Members: 4074
  • Category: Software
  • Founded: Sep 27, 2002
  • Language: English
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Messages 491 - 521 of 24070   Oldest  |  < Older  |  Newer >  |  Newest
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491 Logan, Patrick D
patrickdlogan Send Email
Feb 2, 2004
5:35 pm
... I would suggest not worrying about hierarchies yet. You have a good start on the behaviors these things should provide... ... I don't get the sense from...
492 Stafford, Randy
randalparker... Send Email
Feb 2, 2004
7:31 pm
Right, Role and Player (http://c2.com/cgi/wiki?RoleAndPlayer) can be powerful, even if Coad is too reductionist. But unless I've misunderstood Steven's...
493 John D. Corbett
code_graphics Send Email
Feb 2, 2004
8:11 pm
Ubiquitous language need to connect the domain to the code, not just reflect the domain. It may be very useful to call out or invent the language for the parts...
494 kurbylogic Send Email Feb 2, 2004
9:21 pm
Perhaps I missunderstood I thought he was trying to use it in multiple contexts where being not an either or but one or more. If the type is exclusively one...
495 J. B. Rainsberger
nails762 Send Email
Feb 2, 2004
10:05 pm
... Nobody anywhere (with a mind, that is) is claiming that TDD is a sufficient condition for success. -- J. B. Rainsberger, Diaspar Software Services ...
496 J. B. Rainsberger
nails762 Send Email
Feb 2, 2004
10:08 pm
... It may be that Customer Testing practice does more to enhance DDD than TDD does. In particular, I'm thinking about one key consequence of Customer Testing:...
497 kurbylogic Send Email Feb 3, 2004
12:39 am
I was thinking about the initial question "Choosing between entity and value objects". In my mind all real world objects are have an implied unique identity....
498 kurbylogic Send Email Feb 3, 2004
9:02 am
My last post probably seems backwards to most people... I was thinking about why value types are generally immutable and entities generally not, why values are...
499 Eric Evans
ericevans0 Send Email
Feb 3, 2004
10:53 am
The first part of your post, about values depending for context on the object that contains them, while entities can be tracked independently of other objects,...
500 allan.halme@...
allanhalme Send Email
Feb 3, 2004
10:56 am
I've got a question for Eric -- What are your thoughts on Coad's ideas on use of color in UML diagrams? t.allan This message is for the designated recipient...
501 Eric Evans
ericevans0 Send Email
Feb 3, 2004
11:10 am
I might suggest a single Order class with a Workflow attached and some kind of dataholder attached. That would be one experiment I might try. But the truth is...
503 Ralph Johnson
rej_13 Send Email
Feb 3, 2004
2:24 pm
... Eric liked this, but I don't. It is probably true that if you are not interested in tracking an object outside the context of another object then it can...
504 Shane Mingins
shanemingins Send Email
Feb 3, 2004
7:40 pm
... may not ... If I do not care which red crayon I have do I not model it as a Value Object? confused Shane...
505 Eric Evans
ericevans0 Send Email
Feb 3, 2004
7:53 pm
Oops! I meant to type "value object", not entity. I hope context made it clear to others, as well. It should have read: Even if all red crayons are distinct...
506 kurbylogic Send Email Feb 3, 2004
11:20 pm
... font ... tracking ... certainly ... application ... The number 2 is a "entity" but the integer that represents the number 2 is concidered a "value type"....
507 kurbylogic Send Email Feb 4, 2004
12:07 am
Hmm... perhaps this is exactly what I was looking for... value types represent *relationships* between 2 entities. I cannot think of a instance were you...
508 Eric Evans
ericevans0 Send Email
Feb 4, 2004
1:50 am
I realize that the value/entity distinction is a subtle one, and I admire your energy in searching for a way to grasp it. But I think it is simpler than you...
509 Keith Ray
attkeithray Send Email
Feb 4, 2004
3:29 am
On Tuesday, February 3, 2004, at 05:57 PM, Eric Evans wrote: [...] ... In the above example, 1000 would be a value, but the part of the Money field that...
510 kurbylogic Send Email Feb 4, 2004
6:54 am
Eric wrote: "I don't really know what you mean by 'value-type&#39; in software. This entity-value distinction is a modeling distinction." I'm not sure if that...
511 Eric Evans
ericevans0 Send Email
Feb 4, 2004
9:11 am
I'll hit a few points out of the message, but I think we are reaching diminishing returns. I would urge you to look at other parts of the pattern language and...
512 Eric Evans
ericevans0 Send Email
Feb 4, 2004
9:17 am
Yes, the USD currency is an enumeration, and could reasonably be considered an entity. The number 1000 is a value, as you say. But here's the interesting...
513 Johan Nilsson
oncebroke80 Send Email
Feb 4, 2004
4:51 pm
... *soley* ... with ... understand ... If those domain experts understand it, how does it improve the communication and thinking? Will they look differently...
514 Chris Partridge
partridge_chris Send Email
Feb 4, 2004
7:44 pm
Eric, I am on a project at the moment where these points are being discussed. It seems to me there are two senses of domain, which are not being clearly ...
515 partridge@...
partridge_chris Send Email
Feb 4, 2004
10:11 pm
Eric, I am on a project at the moment where these points are being discussed. It seems to me there are two senses of domain, which are not being clearly ...
516 Eric Evans
ericevans0 Send Email
Feb 4, 2004
10:42 pm
Which model is more like the "real world". That is a philosophical question. Maybe it is unknowable. What we want for software (and in most other situations...
517 kurbylogic Send Email Feb 4, 2004
11:01 pm
... discussed. ... clearly ... Object, ... an ... marker. ... think of it. ... way they ... sense 2. ... Yes exactly, in the ontological model there is no...
518 Eric Evans
ericevans0 Send Email
Feb 5, 2004
12:58 am
... Same domain; different domain model. ... No, the use of a qualifier helps in identifying the entity, in this case. It does not change whether the President...
519 kurbylogic Send Email Feb 5, 2004
3:31 am
... this case. It ... I still say President in the qualified domain model is a Value Object because it can be *derived* from Country and Year. It is the same...
520 Eric Evans
ericevans0 Send Email
Feb 5, 2004
4:05 am
... A president isn't derived from country and year, it is *looked up* from country and year. The name of the president is a value. The president is an entity....
521 Eric Evans
ericevans0 Send Email
Feb 5, 2004
5:20 am
I've often had the question, "What is the difference between domain-driven design and model-driven design?". So I wrote a short article to lay out the ...
Messages 491 - 521 of 24070   Oldest  |  < Older  |  Newer >  |  Newest
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