The Proactive Data Management System (PDMS)  is a tool designed
to manage large datasets in grid environments. It can be used by other higher
level software tools in a secure fashion to manage files based on metadata
describing the contents of the files. This document describes how PDMS can be
used with tools that schedule the movement of data to and from the resources
that use or produce the data. The rest of the document is laid out as follows.
Section 2 describes the PDMS inter- faces. Section 3 explains the workflows
and meta-schedulers and shows how PDMS can be integrated with the workflow
managers. Section 4 explains the Virtual Data Toolkit and integration of PDMS
with it. Finally, the document is summarized in Section 5.
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