Extended Properties

Hi:

Does anyone know of a good primer on extended properties and why I would want to use them. I have you the on-line books sections but that does a clear "why". I have search for white papers and similar documents.

I understand they are good for documentation, but I was looking for something that explain Microsoft long-term vision. How I might use them in template scripts, VSTS, etc.

Thanks in advance for your help.

Gene

Most people tend to use them for documentation, sort of like a built-in data dictionary.