[NTG-context] compare locations of two pagereferences

Dear all, how can one compare the locations of two pagereferences for conditional processing? I tried it with this (mkiv, 2011.01.10): \starttext \pagereference[page:a]bla \pagereference[page:b]bla \at[page:a] % 1 \at[page:b] % also 1 \doifsamestringelse{\at[page:a]}{\at[page:b]}{same page}{different page} % yet, the else-branch gets executed \stoptext Of course this is clumsy, but although I tried to peek into strc-ref I couldn't quite sort out how to directly access the results of \at. Thanks Daniel