OCL 2.3.1 RTF Avatar
  1. OMG Issue

OCL231 — Confusing usage of the "precedes" symbol for generalization hierarchy

  • Key: OCL231-32
  • Legacy Issue Number: 16291
  • Status: closed  
  • Source: DMR Consulting Group ( Dominic Roy)
  • Summary:

    The symbol ≺ is used in this page. According to Unicode definition, this symbol represents a mathematical symbol whose definition is "precedes". Here is the reference of that definition :
    http://unicode.org/cldr/utility/character.jsp?a=227A

    I'm not a mathematician and I don't know precisely what this symbol means for mathematicians, even if I searched in many books and on the Internet. However, I find very confusing to use a symbol that means "precedes" to means "is the child of".

    There is another symbol ≻ which means 'succeeds' that would be less confusing in the sense of "C1 succeeds C2" to means that C1 is the child of C2.

    As I'm not mathematician, I may be completely wrong and I would greatly appreciate a sound reference where this symbol is defined formally.

  • Reported: OCL 2.3 — Sat, 28 May 2011 04:00 GMT
  • Disposition: Resolved — OCL 2.3.1
  • Disposition Summary:

    The current operator has not been significantly changed by the Latex to FrameMaker conversion and so corresponds to an informed academic choice.
    The requested change is less-informed and subjective.
    Disposition: Closed, no change

  • Updated: Fri, 6 Mar 2015 20:58 GMT