  We define the Hochschild (co)homology of a ringed space relative to a locally
free Lie algebroid. Our definitions mimic those of Swan and Caldararu for an
algebraic variety. We show that our (co)homology groups can be computed using
suitable standard complexes.
  Our formulae depend on certain natural structures on jetbundles over Lie
algebroids. In an appendix we explain this by showing that such jetbundles are
formal groupoids which serve as the formal exponentiation of the Lie algebroid.
