UBL Naming and Design Rules SC

  • 1.  Re: [ubl-ndrsc] Rule: 91

    Posted 07-18-2003 14:44
    On Fri, 18 Jul 2003, Eve L. Maler wrote:
    
    >>Aha, so "top level" not-equal "global".  Thanks for the correction.
    
    If your "top-level" means "immediate child of <xsd:schema>",
    then "top level" is "global".   But what I'm saying is
    "naming" != "global".
    
    
    >>In that case, the rule should not say "...which then requires their
    >>declarations be globally defined."  If we want to prohibit redefinition,
    >>we ideally should do that in a separate rule, and not (incorrectly)
    >>imply that naming a type means the definition must be directly beneath
    >><xsd:schema>.
    
    Wait, I'm not saying anything about using or prohibiting
    <xsd:redefinition>,  all I'm quoting is that a named  complexType
    can be a non-immediate child of <xsd:schema>, thus giving a
    counter-example to the assertion that "naming" == "global".
    
    The original rule wordings were:
    
    [R 91]   All type declarations MUST be global.
    
    which says what it wants to say already.
    
    
    A rule about redefinition, if there's an intention to do so,
    would rightly be in a separate rule as you suggested.
    
    
    
    Best Regards,
    Chin Chee-Kai
    SoftML
    Tel: +65-6820-2979
    Fax: +65-6743-7875
    Email: cheekai@SoftML.Net
    http://SoftML.Net/
    
    
    On Fri, 18 Jul 2003, Eve L. Maler wrote:
    
    >>Aha, so "top level" not-equal "global".  Thanks for the correction.  In
    >>that case, the rule should not say "...which then requires their
    >>declarations be globally defined."  If we want to prohibit redefinition,
    >>we ideally should do that in a separate rule, and not (incorrectly)
    >>imply that naming a type means the definition must be directly beneath
    >><xsd:schema>.
    >>
    >>	Eve
    >>
    >>Chin Chee-Kai wrote:
    >>
    >>> On Thu, 17 Jul 2003, Eve L. Maler wrote:
    >>>
    >>>
    >>>>>Actually, I believe naming does equate with being global.  A
    >>>>>topLevelComplexType requires its name attribute, and a localComplexType
    >>>>>prohibits its name attribute from being used.  Roughly the same is true
    >>>>>for simple types.  (See http://www.w3.org/2001/XMLSchema.xsd )
    >>>
    >>>
    >>> No, without loss of generality, let's just look at complexType.
    >>>
    >>> A complexType definition is global if and only if it is located
    >>> as one of the immediate children under <xsd:schema>.
    >>>
    >>> A complexType is named if and only if the name attribute exists
    >>> in the definition.
    >>>
    >>> I refer you to XML Schema Part 1: Structures, Section 4.2.2
    >>> example "v2.xsd" part of which is illustrated:
    >>>
    >>>  <xs:redefine schemaLocation="v1.xsd">
    >>>   <xs:complexType name="personName">
    >>>    <xs:complexContent>
    >>>     <xs:extension base="personName">
    >>>     .....
    >>>
    >>> By definition, this <xs:complexType> definition is not global
    >>> (not necessarily local), AND named.
    >>>
    >>>
    >>>
    >>> Best Regards,
    >>> Chin Chee-Kai
    >>> SoftML
    >>> Tel: +65-6820-2979
    >>> Fax: +65-6743-7875
    >>> Email: cheekai@SoftML.Net
    >>> http://SoftML.Net/
    >>>
    >>>
    >>>
    >>>
    >>>>>So probably the rule could be shortened to:
    >>>>>
    >>>>>[R 91]  All types MUST be named.
    >>>>>
    >>>>>Explanatory text could then mention that the purpose is for reuse and
    >>>>>extension, and that the syntactic consequence of the rule is that the
    >>>>>types must all be declared as top-level.
    >>>>>
    >>>>>	Eve
    >>>>>
    >>>>>Chin Chee-Kai wrote:
    >>>>>
    >>>>>
    >>>>>>On Mon, 14 Jul 2003, Dan Vint wrote:
    >>>>>>
    >>>>>>
    >>>>>>
    >>>>>>>>I would modify this rule to be:
    >>>>>>>>
    >>>>>>>>
    >>>>>>>>
    >>>>>>>>>[R 91]   For reuse and extension, all types MUST be named, which then
    >>>>>>>>>requires their declarations be globally defined.
    >>>>>>
    >>>>>>
    >>>>>>Naming does not equate with being global.
    >>>>>
    >>>>>--
    >>>>>Eve Maler                                        +1 781 442 3190
    >>>>>Sun Microsystems                            cell +1 781 354 9441
    >>>>>Web Technologies and Standards               eve.maler @ sun.com
    >>>>>
    >>>>>
    >>>
    >>>
    >>>
    >>> You may leave a Technical Committee at any time by visiting http://www.oasis-open.org/apps/org/workgroup/ubl-ndrsc/members/leave_workgroup.php
    >>>
    >>>
    >>
    >>--
    >>Eve Maler                                        +1 781 442 3190
    >>Sun Microsystems                            cell +1 781 354 9441
    >>Web Technologies and Standards               eve.maler @ sun.com
    >>
    >>