I am taking a crash-course in ORM for a new project and after reading several of Terry Halpin's works (ORM: overview; Business Rules and ORM) I'm a bit...
... Hi Joe - good to have you joining the group, A "crash course in ORM" - ORM never crashes; though the same can't be said for every ORM tool or application. ...
Folk, I know I've been too quiet, but ActiveFacts is not dead! I'd been tied up with some Ruby on Rails projects which have reached a quiet spot again, and I ...
I've been playing with the idea for an ORM tool in a web browser for a while now. One of the limiting factors is that there's no real "drawing surface" in a...
I keep thinking that it should be possible to create a diagram editor using (say) JavaScript and SVG, or perhaps Laszlo, but I haven't seen anything I'm brave...
Hi, Been snowed under with other stuff for last couple of weeks, but spotted your note in an Outlook inbox. Have you looked at MS SilverLight and XAML? I...
Tyler, ... I think you know this has been in my purview for some time, but outside the "necessary core" of ActiveFacts. Matter of fact, I did a review of SVG ...
I seek advise for solving my dilemma on which of the two MK books authored by Terry Halpin. I don't need to be convinced that ORM is superior to ER or other ...
The book for Database modeling simply goes overhow to use Visio for EA. The Information Modeling book is the one you want. You can skip over the parts about ER...
... Although a significant part of the IM&RD book is devoted to this comparison, the content is valuable even for a convert for various reasons: * We must...
I'm playing around with drawing some ORM-like diagrams, using Graphviz: http://www.cfcl.com/rdm/diagrams/SS_x3.png. I'm not sure, however, how I should place...
... I thought that Graphvis was supposed to work that out for you? I recall seeing a little Java applet some years ago that used something like simulated...
I've often thought how nice something like this would be lately too. Often when I enter Object-roles in the fact editor, i am perplexed about how the new...
Thanks for the thoughts, Brian and Clifford! Brian, I've looked into XAML at various points in the past, and it's always been "just not there yet." Maybe it is...
since I don't have a way to attach files or images, i'll try to frame my question as accurately yet succinctly as possible. I have to model an existing...
Joe, ... This Yahoo group has files and photos pages where any member may upload images, etc. Go for it! ... NORMA doesn't yet allow much flexibility in the...
... Likewise. With the right toolkits, AJAX and SVG should be feasible in browsers without plugins. Although I've been disappointed with my explorations of SVG...
Thank you Clifford for your thoughtful and patient response. Yes, it's hard to stay focused on ORM conceptual thought when the immediate goal is to replicate a...
Oops, I see that Yahoo groups broke the links to yahoo photos. Hmpf. Sorry about that. After ruminating on the dilemma of using ORM to model a bad database ...
several times i have run into the terms 'set' and 'bag' used together in the context of constraints on population. In this context,what does 'bag' mean? ...
... In mathematics, a multiset (or bag) is a generalization of a set. A member of a multiset can have more than one membership, while each member of a set has...
Clifford, I read with great interest your work at http://dataconstellation.com/ActiveFacts/examples/ I have two questions about this: at the end, under ...
... Well, that's what I was trying to demonstrate. Any relation (fact type) that has more than one attribute in addition to its primary key is compound, not...
I am more familliar with .NET than the others, but that's not saying much. I'm just an SQL guy and now I'm having to learn a bunch of different technologies at...
Starting from the trivial example in chapter 1 of Information Modeling: Activity is held in Room during HourSlot ... 1 | A | 14 1 | A | 15 2 | B | 14 the IUC...
Joe, I don't think that ORM has a way to specify such constraints on non-overlapping time intervals. The issue is that instead of simple equality/inequality,...
On further reflection, ORM has a way to allow my event_date sorting... as a derived fact type. A fact type can be derived without having to show the derivation...
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