flatten out probe_set records so we have one document per probe_set not one per combination of probe_set and array_name (much like we've done with probes)
flatten out probe_set records so we have one document per probe_set not one per combination of probe_set and array_name (much like we've done with probes)

Ensembl/ensembl-webcode,Ensembl/ensembl-webcode,Ensembl/ensembl-webcode,Ensembl/ensembl-webcode,Ensembl/ensembl-webcode