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John's Suggestion (Was: Re: SAX2 Namespace Support)

  • From: "Clark C. Evans" <clark.evans@m...>
  • To: John Aldridge <john.aldridge@i...>
  • Date: Wed, 5 Jan 2000 16:24:27 -0500 (EST)

isuri
Pretty.  John's Suggestion is a step in the right direction.

On Wed, 5 Jan 2000, John Aldridge wrote:
> 
> class QName {
> public:
>     wstring nsURI () const;        // http://www.w3c.org/1999/xhtml
>     wstring localPart () const;    // p
>     bool operator== (const QName &rhs) const;
> };
> 
> class ElementInfo {
>     QName name () const;
>     wstring nsPrefix () const;     // html
>     wstring prefixedName () const; // html:p
>     AttributeList &attributes () const;
> };
> 
> void startElement (const ElementInfo &info) throws SAXException;

However, it still fails the following "non-namespace" edge case...

    { not-specified, "html", "p" } == { not-specified, "html", "p" }
and { not-specified, ""    , "p" } != { not-specified, "html", "p" }
  
Let's repair...

  class QName {
    public:
      boolean isURI()      const;
      wstring qualifier()  const;  
      wstring local()      const;
      bool operator== (const QName &rhs) const;
  };

Where, in the not-specified cases, isURI() returns "false", 
and qualifier() returns the prefix.  And, in the specified
cases, isURI() returns "true" and qualifier() returns the URI.

Clark


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