Russell,
Thanks.
Alex

Alexander Balaev
Ford Application Management Center
voice: 313-206-3741
mailto:abalaevford.com

Essentially, if by "data sets" you mean something which advertises
membership in a pre-defined class of things. This is what component
categories are all about.

Here's a graphic example of what a particular component might look like in
the registry.
In this case, note the three different GUIDS under this component's
Implemented Categories; so this component is a member of three different
categories. Elsewhere in the registry, the category is actually described.

HKEY_CLASSES_ROOT
   CLSID
      {8C439002-14EC-11D2-A27E-080009B6F22B}
         Implemented Categories
            {40FC6ED5-2438-11CF-A3DB-080036F12502}
            {6ED8A829-5036-11D3-9FB3-00C04F6BC6A5}
            {C0CE08F6-9CC1-11D0-B4AD-0000F8037368}

         InprocServer32
            H:\\Af\\bin\\Annotation.dll
            ThreadingModel = Apartment

Keep in mind that this is just one way of doing it. It happens to have been
invented by Microsoft and is standard, but it has it's short comings (no
native support for category stuff in VB for one). You could just as well
use a file based mechanism or create your own registry based system for
doing the same thing.

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