Linking published scientific results with the data on which they are based has been a growing trend. In some disciplines, such as molecular biology, journals require submission of data to a recognized data center as a condition for publication of the associated article. Data centers, government agencies, and journals have been seeking new ways to link publications and data. The push for transparency of science is also moving most fields of science in this direction. The benefits of publishing data and standardizing their provenance have been documented in several locations [European Union, 2010; Ball and Duke, 2012].