Re: [xml-dev] Are people really using Identity constraints specified

[Jonathan Robie <jonathan.robie@datadirect.com>]

So in this sample, 5.3 percent of schema documents used identity 
constraints. Do these schemas have anything in common - do they come 
from similar application domains?

Jonathan

Henry S. Thompson wrote:
> I have a collection of slightly over 1000 distinct schema documents
> culled from the web, which I'll be describing and releasing soon.  I
> just checked, and conservatively the numbers are as follows:
> 
>   schema documents using key, keyref and/or unique:  53
>   uses of unique:                                   105
>   uses of key:                                      179
>   uses of keyref:                                   229
> 
> ht