| http://www.w3.org/ns/prov#value | - Predicted the rise and popularity of reality TV. Structured Data ??? defined format, such as XML document or database tables Semi Structured Data ??? May be a schema but often ignored eg. spreadsheet, in which cells/fields can store any type of data Unstructured Data ??? no particular internal structure eg. plain text, image tile, twitter feed. 80% of Big Data is unstructured.
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