Conclusion

\label{conclusion}
The DataSpace for HIV vaccine studies is a growing resource available to hundreds of investigators for learning about completed studies, assays, and vaccine products, and for generation of new hypotheses. Investigators who participated in our design research have always believed in the potential of VA for completed studies. Beta evaluation has shown the DataSpace not only had positive impacts on their work but also improved their opinion of the value of data sharing. We prioritized tasks that dealt with multiple studies and assays and found that they accounted for most of beta usage. Domain-specific visual analytics features and a focus on non-analyst self-service contributed to a system that makes it much easier to learn about completed studies and explore ideas using data from multiple sources.