Namespaces on Attribute Names
david at megginson.com
Mon Jul 20 21:11:16 BST 1998
Murray Altheim writes:
> This of course required that I add a namespace variable to my class def.
> for Element. I have not yet added any support for namespaces on attributes,
> as I can't understand the rationale.
Can't understand, or don't agree with? I have to admit that I have
been uncomfortable with the idea myself.
In any case, I'll offer myself as a victim to your pseudo-Socratic
feigned ignorance, and suggest that namespaces on attributes are meant
to represent a kind of implicit multiple inheritance, where the
derived class is never explicitly named. Compare the following (the
CRTC is the Canadian government's big-brother media supervisor -- if
anyone wants to get me started on the CRTC, send private
<doc id="xxx" LC:refNo="BS123.456 1998" CRTC:rating="family">
Conceptual Equivalent in C++
String &getRefNo ();
String &getRating ();
String &getId ();
// This class is implicit.
class MyDoc : public Doc, public LC, public CRTC
All the best,
David Megginson david at megginson.com
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