Mage Tab File Format

The MAGE-TAB specification can be found at: http://ebi.ac.uk/ArrayExpress . This format includes files that describe an experimental series, the samples used in the experimental series,
optionally the array design of the microarray chips employed in the study, and a data matrix file containing gene expression data values
TDMS files encapsulate the expression data from multiple samples into a single tab delimited file.
Each sample represented in the file will have a single dedicated column that contains the expression data for that sample.
Each row, below the header rows, represents information relating to a particular spot on the slide.

For more information look in to "Loading MAGE-TAB format files" in the MeV manual