Significant Issue: Access to Data
Tailored
push; also pull (My Intelink), including changes of sufficient
magnitude
Subscriptions and data descriptions for matching against subscriptions
may be best done using hierarchical ontologies
Crawlers
of value, but may have access control issues
Uncertainty
of data (both by source and about source)
Inference-based
retrieval of information
Pedigree
critical to maintain
Indexing
of markup important for speed of access