OASIS Emergency Management TC

EDXL DE - XML Schema Issue

  • 1.  EDXL DE - XML Schema Issue

    Posted 11-09-2005 04:03
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    Subject: EDXL DE - XML Schema Issue


    
    
    There are a few major/minor issues with the XML Schema used in EDXL  
    DE CD 1.0 (19 Aug 2005).
    
    Major:
    1 - It does not support ANY reusability as all the elements and  
    datatypes are locally defined.
           (Common datatypes should be globally defined and reused, for  
    example for valueListURN.)
    
    2 - It uses full element names (including the angle brackets) in the  
    Annotation elements which
           renders it as an *invalid* schema (tested with XML Spy and  
    Oxygen).
    
    3 - It does not define attributes that are mandatory (eg for circle  
    and polygon).
    
    4 - Does not support a single top level parent element which means  
    that having a valid EDXLdistribution
           is not possible.
    
    5 - valueListURN and value elements can occur in semantically  
    incorrect sequences.
    
    Minor:
    1 - It references Schemas to import that are not required.
    
    2 - It is extremely verbose as it repeats all the documentation from
           the specification in the annotation elements (double  
    maintenance effort required)
           and difficult to read.
    
    3 - Should define the targetNamespace as the default namespace.
    
    
    I am happy to propose an updated XML Schema that addresses the above  
    is the TC feels this is appropriate.
    
    Cheers...  Renato Iannella
    National ICT Australia (NICTA)
    
    
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