  We point out that in inclusive B -> Xs l+ l- decay an angular decomposition
provides a third (q^2 dependent) observable sensitive to a different
combination of Wilson coefficients than the rate and the forward-backward
asymmetry. Since a precise measurement of q^2 dependence requires large data
sets, it is important to consider the data integrated over regions of q^2. We
develop a strategy to extract all measurable Wilson coefficients in B -> Xs l+
l- from a few simple integrated rates in the low q^2 region. A similar
decomposition in B -> K* l+ l-, together with the B -> K* \gamma rate, also
provides a determination of the Wilson coefficients, without reliance on form
factor models and without having to measure the zero of the forward-backward
asymmetry.
