In general, this is a well written spec suitable as version 1.0. 

In Section 3, please be consistent with the names in the text and figure 1; for instance "Factory Port Type" of the 
figure should be "Data Transfer Factory Port Type" etc. 

Section 4.1.1. requires an undo strategy for each supported protocol which is only described later in Section 4.1.2 - I 
would recommend to include Section 4.1.2 in 4.1.1

The specification of the different undy strategies in 4.1.2 should move to the XML representation (4.1.2.1) to be 
consistent with the discussion in 4.1.1

Section 4.2.1.2 (source and sink DEPR) would gain by providing one or two examples, for instance, how to render a 
gridftp DEPR or an SRM DEPR