Sarah Cohen Boulakia Christine Froidevaux Emmanuel Pietriga Selecting Biological Data Sources and Tools with XPR, a Path Language for RDF. 116-127 2006 conf/psb/2006 Pacific Symposium on Biocomputing http://psb.stanford.edu/psb-online/proceedings/psb06/cohen-boulakia.pdf db/conf/psb/psb2006.html#BoulakiaFP06