Article:		Valid Frustrations
Subject:		Sample DTD not well-formed
Date:		2001-09-27 12:07:18
From:		Wayne Steele
I hate to be a curmudgeon, but one of the sample DTD fragments here is illegal: <!ELEMENT fruit_basket (banana*)> <!ELEMENT banana EMPTY> <!ATTLIST banana banana_number (1 | 2 | 3) "1" > The enumerated values for an attribute MUST conform to the NMToken production - this means that "1", "2", etc are forbidden. Here's a legal version of the DTD: <!ELEMENT fruit_basket (banana*)> <!ELEMENT banana EMPTY> <!ATTLIST banana banana_number (_1 | _2 | _3) "_1" > There's another annoying DTD limitation for you. -Wayne Steele

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• Sample DTD not well-formed
  2001-09-28 16:54:46 Nigel Armstrong
  
  Disagree...an NMTOKEN is slightly less restrictive than an XML Name, so 'numeric' enumeration values are OK.

  
  From the spec:

  
  NameChar ::= Letter | Digit | '.' | '-' | '_' | ':' | CombiningChar | Extender
  Nmtoken ::= (NameChar)+

  
  Nigel
  
  

  • Sample DTD not well-formed
    2001-10-01 18:20:10 Wayne Steele
    
    I stand very much corrected.
    Thank you for pointing this out.

    
    -Wayne Steele