The ORM Foundation

Get the facts!
All Tags » Subtype (RSS)

Browse by Tags

  • Transitive implication in a subtype graph

    In NORMA, suppose I create three object types (A, B, C) and declare that: A is a subtype of B B is a subtype of C A is a subtype of C In this situation, NORMA reports an error message stating that "Direct supertypes...must be overlapping without transitive implication." Why does transitive...
    Posted to NORMA (Forum) by Matt Nizol on Sat, Mar 28 2015
  • Re: Error in exclusive-or subtyping population

    Hi Ken and Matt, Thanks Ken for your fast reply but based on Matt answer is a missig feature :S. Mat, I understand the implementation issues of this feature, although I´d recommend putting this void in the checking in some kind of release information note for future users. However, I am glad to have...
    Posted to Technical support (Forum) by Nieves85 on Tue, Oct 18 2011
  • Error in exclusive-or subtyping population

    Hello all, I have created a hierarchy based on subtying connectors using the Exclusive-Or constraint between subtypes.When I am testing the hierarchy through population I create an instance of the father and then I assign that instance to two different types of children. It should raise some error as...
    Posted to Technical support (Forum) by Nieves85 on Mon, Oct 17 2011
  • problem with entity subtyping in NORMA Lab4 with VisualStudio2008

    Hello In working through the Lab4 tutorial, I had a little trouble on page 21, where I am supposed to add a subtype definition for MaleEmployee. My Properties window for MaleEmployee (or any other entity) does not seem to have Derivation Rule as one of the items, so I can't add a rule. Please note...
    Posted to Technical support (Forum) by chris young on Wed, Mar 23 2011
  • Re: Populate a sub-type

    The role names didn't help. I then tried something that "helped" in the sense that I think it shows where the bug is. I gave a reference mode to the subtype. This allowed data entry in the Sample Population Editor. Unfortunately, it adds a bogus extra column to my database table, so has...
    Posted to Technical support (Forum) by Anonymous on Fri, May 9 2008
Page 1 of 1 (5 items)
© 2008-2022 The ORM Foundation: A UK not-for-profit organisation -------------- Terms of Service