The ORM Foundation

Hi, Is it possible in NORMA to have several Barker ER Views, namely one per page on which I draw parts of the ORM model? Regards, Jacob

Hello, Did you run 'PLiX for Visual Studio.msi' that comes with the NORMA for VS2015 download? Regards, Jacob

Hi Marc, Yes, that's OK. I guess you can find my phone number and mail address. Regards, Jacob

Hi Marc, I can help you with a Dutch language file and how to use it. It doesn't translate everything, but most of the labels. Today and tomorrow I haven't enough time, but Thursday I can assist you if you want. Kind regards, Jacob Vos

Hi Terry, Thank you for your answer. I now changed it into how it is shown below. Regards, Jacob

Hi, I am looking how to model that a maximum rental period is defined for a certain year. For example: for year 2015 the maximum rental period is 20 days, for year 2016 the maximum rental period is 30 days, etcetera. See below some alternatives to model the period. Which one is the best, and why? Or which other alternative is better, and ...

See below for a graphical answer. I hope it's clear. - Jacob

Hi Terry, I agree with you that a dynamic rule is better here. Thank you for your comments and rephrasing. Question: Is the syntax you use for derivation rules and for dynamic constraints published anywhere? I guess it's not - completely - in the 'big brown book'. Regards, Jacob

Hi Terry, I hoped there was a shorter way to define this - alethic - constraint, without derived fact types... I was wondering why you defined a binary for the derived fact types. A bid can be for only one advertisement. So I would say unaries are OK. See the picture. I defined the derivation rules as follows: Bid1 is highest if and only ...

Hello Terry, Thank you for answering. The fact types you suppose are correct, except that we pay in euros ;-). See the image below for the fact types I consider as relevant for my question. I think I didn't explain the situation well enough. Consumers can make bids and see each others bids. It is forbidden to make a bid that is ...