The ORM Foundation

Get the facts!

Search

Page 1 of 15 (145 items) 1 2 3 4 5 Next > ... Last »
  • Re: NORMA Lab 4

     I assume you mean slide 25 of Lab 4. The square brackets are around role names. NORMA automatically adds the square brackets when you enter the role name.  To add a role name, right-click the role box and enter the name in the Name property. Cheers Terry 
    Posted to Discuss documentation (Forum) by Terry Halpin on Sun, Jun 4 2017
  • Re: Irreflexive Ring vs. Value Comparison constraint -- Are they equivalent?

     Hi Gordon Yes, an irreflexive ring constraint is equivalent to a value-comparison constraint with the inequality operator. E.g. a simple irreflexive constraint on a binary predicate R formalizes as  forall x not xRx, and a corresponding value-inequality constraint formalizes as  forall x, y (xRy -> ~x=y). It's easy to prove ...
    Posted to Technical support (Forum) by Terry Halpin on Thu, Apr 20 2017
  • Re: Latest version of Tutorials

     Hi Jeff  Which file do you mean by "Tutorial 1"?  If you mean NORMA Lab 1 (which I updated on 2016 August 31), then slides 22-24 don't have any verbalization on them. Please clarify.  Cheers Terry   
    Posted to Discuss documentation (Forum) by Terry Halpin on Thu, Apr 6 2017
  • Re: Using ORM to Model User-defined DataTypes

     ORM recognizes three kinds of object types: entity type (e.g. Country); domain value type (e.g. CountryCode) often shortened to "value type", and data type (e.g. string). Value types carry more semantics than data types (e.g. the CountryCodes 'CH'and 'DE' are based on Latin and German ...
    Posted to ORM Techniques (Forum) by Terry Halpin on Sun, Oct 23 2016
  • Re: Thank you

     Dear Berhanu  Congratulations on earning your master's degree!  And thank you for your kind words of appreciation for my support. It was a pleasure discussing ORM with you. Kind regards Terry 
    Posted to Contributed Models (Forum) by Terry Halpin on Mon, Mar 28 2016
  • Re: Relational View - different display formats?

    Hi Marc While we do support those other display options at the conceptual level, their use at the relational level seems inappropriate. Perhaps you could describe the specific relational notation(s) you would like us to support. Cheers Terry 
    Posted to Open Discussion & Feature Requests (Forum) by Terry Halpin on Sat, Feb 6 2016
  • Re: RDF and OWL and Visual OWL

    Hi Alan For some further details on how ORM compares with OWL and RDF, please see the fifteen articles I wrote on Ontological Modeling for the Business Rules Journal. You can download these from the Resources section of my website www.orm.net. Cheers Terry 
    Posted to RDF & OWL & OCL (Forum) by Terry Halpin on Thu, Dec 17 2015
  • Re: Sort/Arrange automatically?

     NORMA does not include options for controlling its auto-layout of diagrams, but you can simply drag model elements to better positions. You can also manually align etc. elements using the usual alignment etc. menu options in Visual Studio.  Cheers Terry   
    Posted to Open Discussion & Feature Requests (Forum) by Terry Halpin on Sun, Oct 18 2015
  • Re: Mapping ORM to relational schema in NORMA?

     Yes, an ORM tool such as NORMA can map ORM schemas to relational schemas, although currently some of the more advanced constraints are not mapped. If you are using NORMA, just right-click an empty space in the Document Window, select Extension Manager from the context-menu, click Relational View and press OK to see a diagram of the ...
    Posted to Open Discussion & Feature Requests (Forum) by Terry Halpin on Sat, Oct 17 2015
  • Re: Requiring a join path when modelling as objectified facttype

     Hi Karl Thanks for showing your schema diagram. That clarifies the semantics you intended. I misunderstood your intent, as I assumed that if a Rate was owned by a company it couldn't be shared.  It is now clear why you get a syntax error for that exclusion constraint. I have modified my model to be sufficiently similar to yours to ...
    Posted to Technical support (Forum) by Terry Halpin on Sat, Oct 10 2015
Page 1 of 15 (145 items) 1 2 3 4 5 Next > ... Last »
© 2008-2017 The ORM Foundation: A UK not-for-profit organisation -------------- Terms of Service