Whats the policy on publication of data sets?
As a condition of publication, authors must agree to make available all data necessary to understand and assess the conclusions of the manuscript to any reader of Science. Data must be included in the body of the paper or in the supporting online material, where they can be viewed free of charge by all visitors to the site. Certain types of data must be deposited in an approved online database, including DNA and protein sequences, microarray data, crystal structures, and climate records. The accession numbers must be included in the published paper and coordinates must be released at the time of publication. A list of acceptable databases can be found here.