No, DSpaceDirect does not support CAS currently. However, there was some development work being conducted in order to support CAS in the latest release of open source DSpace. Unfortunately, it was not finished in time of the release. The work will likely be rolled into next year's release of DSpace (which at that time, would then be made available in DSpaceDirect). So, the short answer is that CAS is not supported by DSpaceDirect yet, but will be as soon as CAS support is added to DSpace.
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