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Voluminous information (scalability)
Linearity → physical locality tradeoffs
dle multimedia Manipulation unstructured full-text documents, semi-structured (XML), large objects (
Balance implicit and explicit descriptions
Integrate semantic web with databases
Description Cooperative work using social networks
Reason about trust, privacy and security.
Information lost → conceptual, logical, physical perspectives.
Model diversity: network/hierarchical, relational, OO, logical, semantical, graph, etc
Handle uncertain and incomplete data, normalize non-tabular data, preserve prove
Acquisition scattered, many providers, lack of search engines for scientific datasets (exceptions bioinforma
Extraction Feasibility, preserve provenance, lack of semantics
Transference Availability, voluminous data, bandwidth, protocol
Publication Lack of intention, enforce access control, traceability