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  • Re: Using ORM to Model User-defined DataTypes

    OK - here is an outline&nbsp;of &quot;where I am coming from&quot; on this one.&nbsp; When&nbsp;creating an object-role model an ORM analyst starts by listening to people that we call &quot;domain experts&quot; and looking at the forms that they use to communicate information. A &quot;domain expert&quot; is someone who knows a lot about the ...
    Posted to ORM Techniques (Forum) by Ken Evans on Thu, Oct 20 2016
  • Re: Using ORM to Model User-defined DataTypes

    &nbsp;After a bit of thought, I made this model which I hope is of help. Ken &nbsp;
    Posted to ORM Techniques (Forum) by Ken Evans on Thu, Oct 20 2016
  • Re: Using ORM to Model User-defined DataTypes

    Can you explain why&nbsp;you want to start by&nbsp;defining an object type that has a user defined type as a reference scheme? Other comments:&nbsp; A &quot;Customer&quot; is a role that is played by a &quot;Person&quot; (where a Person can be a legal entity such as a Company or Government department) In my experience,&nbsp;customers are ...
    Posted to ORM Techniques (Forum) by Ken Evans on Wed, Oct 19 2016
  • Re: Where to start with mapping equality set constraint to sql check constraint?

    &nbsp;Hi Bill, Thanks for your post.&nbsp;I&#39;ll work on this and get back to &nbsp;you. Ken&nbsp;
    Posted to Developers (Forum) by Ken Evans on Sat, Sep 10 2016
  • Re: Where to start with mapping equality set constraint to sql check constraint?

    &nbsp;Hi Bill, If you look at the forum, you will see that you are one of many people&nbsp;who has tried to&nbsp;understand the NORMA code with a view to&nbsp;fixing&nbsp;bugs and/or adding new features.&nbsp; Matt really is&nbsp;the&nbsp;best person to answer this question but&nbsp;whilst he is aware of your question,&nbsp;he is&nbsp;snowed ...
    Posted to Developers (Forum) by Ken Evans on Sat, Sep 10 2016
  • Re: Which solution/project types?

    &nbsp;Hi Paul, Before you can use an object-role modeling file with Visual Studio, you have to install NORMA. (Downloadable from the library) Then, if you want to create a new .orm file in Visual Studio, you&nbsp;use File&gt;New&gt;File,&nbsp;scroll down the list and click on &quot;Object-Role Modeling file. If you want to use&nbsp;an existing ...
    Posted to Technical support (Forum) by Ken Evans on Fri, Jul 15 2016
  • Re: Subtypes

    There are two stages in making subtypes in NORMA. The&nbsp;first stage is&nbsp;to make sure that you are using the&nbsp;ORM subtype paradigm to think about your Universe of Discourse(UoD). The ORM subtype paradigm is&nbsp;based on sets and&nbsp;membership of sets. Terry&#39;s 2008 book discusses this and this website has an introduction. ...
    Posted to ORM Techniques (Forum) by Ken Evans on Mon, May 30 2016
  • Re: Thank you

    Hi&nbsp; Berhanou, Well done for getting your Masters Degree. The results of your hard work should serve as an inspiration to others. Thanks for your comments and kind words.&nbsp;I&#39;m glad I was able to help. Ken&nbsp;&nbsp; &nbsp;
    Posted to Contributed Models (Forum) by Ken Evans on Mon, Mar 28 2016
  • Re: Relational View - different display formats?

    Hi Marc, As Terry mentions in his book, Clive Finkelstein developed the Information Engineering notation and it was later popularised by James Martin with whom I used to do TV shows. &nbsp;As we discussed offline, James gave me a copy of his original IE documentation. In 1989,&nbsp;James published IE in three books that may still be available ...
    Posted to Open Discussion & Feature Requests (Forum) by Ken Evans on Wed, Feb 24 2016
  • Re: Relational View - different display formats?

    &nbsp;Hi Marc,Regarding Information Engineering, page 320 in Terry&#39;s 2008 book contains a 1:1 mapping between some aspects of&nbsp;IE notation and ORM. You&nbsp;can also change some aspects of the ORM notation by choosing from&nbsp;the Visual Studio&gt;Tool&gt;Options&gt;Entity Relationship Learning Modes. &nbsp; Ken&nbsp; &nbsp; &nbsp;
    Posted to Open Discussion & Feature Requests (Forum) by Ken Evans on Wed, Feb 24 2016
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