can you help to give some information about the format of the training dataset?

can you help to give some information about the format of the training dataset?

for the two part of the data,what does each stand for?
the first part of each column is the userid & itemid respectively? and the rest is the user's feature and item feature?

thanks very much

1-6041-6042-6043	3186-3711
1-6041-6042-6043	1270-3709
1-6041-6042-6043	1721-3711
 
