RE: equivalence of two predicate tests

>   in a book i'm perusing at the moment, there's a discussion 
> of simple predicates that's a bit confusing, so i just wanted 
> to verify that the following two expressions were equivalent:
> 
>   elt1[elt2/@attr="value"]
> 
>   elt1[elt2[@attr="value"]]
> 

They are indeed equivalent. But don't try to generalize this too far:
the following expressions are NOT equivalent:

   elt1[elt2/@attr="value" and elt2/@attr2="value"]
 
   elt1[elt2[@attr="value" and @attr2="value"]]

Michael Kay


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