[BioC] Where does BioC metadata come from?

[Suraj Menon]

Hi all,
Would anyone know how the data in the BioC metadata packages is
generated?
The only info I get from the website is that it was 'assembled using
data from public data repositories'.
I assumed that it was based on the annotation speadsheets provided by
Affymetrix.
However, I find some differences in the numbers I get when from either
source.
For example more probesets in any chip have an EG id in the BioC
metadata than in the Affy spreadsheets.
Also sometimes the EG ids for a probeset are different:
for example  for the hgu95av2 probset 31630_at, the EG id in the AFFY
spreadsheet is 84991 (human Rbm17), while the EG id in BioC for the same
probeset is 76938 (mouse Rbm17). 
I use BioC 1.7
Any help regarding this would be greatly appreciated.
Regards.


Suraj Menon
PhD Student
Department of Pathology
Henry Wellcome Building
School of Medicine
Cardiff University
Heath Park
Cardiff CF14 4XN

Tel:    +44 29 2074 3979
Email: MenonS1 at Cardiff.ac.uk