In model inter-comparisons one major obstacle is the format of the rep
orted data. To facilitate the analysis of the results from the differe
nt models they should all be reported in the same format. This require
s that the format is flexible enough to be easily implemented into the
different land surface schemes. It should also be fault tolerant and
allow a few consistence checks to avoid erroneous data to be submitted
. The present note describes such a format developed for the PILPS pro
ject. After discussing the aim of this new format we present the routi
nes which are used to write and read data. Finally two applications ar
e described which allow the user to perform a number of consistency ch
ecks on the data.