Hi Rhoda, Thanks very much for your kind offer, but I guess my point is that I would like an official reference so that I don't have to ask, but can just look them up. Particularly when the names change. Or find out what's the difference between things like 'structure_transcript_stable_id' and 'ensembl_transcript_id', or what are the 'structure_' attributes versus 'sequence_' and when can I mix and match, etc. I'm guessing this should be documented in either Ensembl or biomart webpages, but I'm not sure which or where. I would ask on those pages, but I was not sure if any of it is specific to biomaRt. Best, Elizabeth Rhoda Kinsella wrote: > Hi Elizabeth, > Can you provide me with some examples of the attributes that you > frequently use and I can try to define them for you? > Kind regards, > Rhoda > > On 9 Jan 2009, at 00:41, Elizabeth Purdom wrote: > >> Hello, >> This is an extremely basic question regarding biomaRt. Where can I >> find careful descriptions of what the attributes mean? I've tried all >> kinds of searches, but I don't think I'm hitting on the right term. >> For example, I'm accessing ensembl and I've never understood the >> difference between some of the attributes I frequently. >> Thanks, >> Elizabeth >> >> _______________________________________________ >> Bioconductor mailing list >> Bioconductor at stat.math.ethz.ch >> https://stat.ethz.ch/mailman/listinfo/bioconductor >> Search the archives: >> http://news.gmane.org/gmane.science.biology.informatics.conductor > > Rhoda Kinsella Ph.D. > Ensembl Bioinformatician, > European Bioinformatics Institute (EMBL-EBI), > Wellcome Trust Genome Campus, > Hinxton > Cambridge CB10 1SD, > UK. >