This article explores the present state of integration between data and publications. The statistical findings are based on the project PARSE.Insight, which was carried out with the help of EU funding in 2008 - 2010. The main conclusion drawn from these findings is that currently very few conventions and best practices exist among researchers and publishers in how to handle data. There is strong preference among researchers and publishers alike for data and publications to be linked in a persistent way. To achieve that, we advocate good collaboration across the whole information chain of authors, research institutes, data centers, libraries and publishers. DataCite is an excellent example of how this might work.