Quaero: Making HEP data publicly available

 High energy collider data in its raw form is useless to physicists 
 outside the experiment -- the interpretation of those data requires 
 an intimate knowledge of the detector and its foibles. 
 This presents a serious problem to an experiment wishing to preserve 
 its data for future analysis.

 The DZero collaboration has found that it is possible to "package" this 
 intimate knowledge into a web-based interface (Quaero) that allows any 
 high energy physicist to perform an analysis on a subset of the data 
 collected in Run I of the Fermilab Tevatron.  I will describe the key 
 enabling ideas, and will show the results of several Quaero analyses.