Converter which can pull from ArrayExpress (by an accession number) or read local files and convert them to ISAtab. Lead by Philippe Rocca-Serra & Eamonn Maguire, University of Oxford
We found that in some study files (possibly also assay files) generated by the converter from ArrayExpress MAGE-TAB files multiple, identically named attribute columns are generated for the same node.
The characteristics "tissue/development stage", "time point" and "tissue" appear twice and are assigned to the source name node. It appears that the MAGE-TAB SDRF file is the source of this duplication.
Our suggested solution is to merge the duplicated columns for each node by concatenating their content.
(Originally reported in the ISAforum: https://groups.google.com/forum/?fromgroups#!topic/isaforum/ikNZH9Or570)
We found that in some study files (possibly also assay files) generated by the converter from ArrayExpress MAGE-TAB files multiple, identically named attribute columns are generated for the same node.
One example for this can be found in the study file generated for E-GEOD-16013: http://www.ebi.ac.uk/arrayexpress/experiments/E-GEOD-16013
The characteristics "tissue/development stage", "time point" and "tissue" appear twice and are assigned to the source name node. It appears that the MAGE-TAB SDRF file is the source of this duplication.
Our suggested solution is to merge the duplicated columns for each node by concatenating their content.