Value-added intermediate services 1
Filters attached to the customer model; balance relevant volume and precision
Wrap resources to make them compatible,
exploit wrapper templates, skip unavailable sources
Match available metadata and indices of resource contents to leaf nodes in the customer model
Monitor and index public metadata,
describe resource capabilities, contents & methods
Needs Technologies extant and new
Select relevant resources
Filter out excessive data
Build interpretable workflow model with
meta-specifications for selection