•Content Features (queries too)
–Not only text
•Statistics, images, music, code, streams,
biochemical
–Multimedia, multilingual
–Dynamic
•Temporal (e,g., blogs, wikis, sensor streams)
•Conditional (e.g., computed links, recommendations)
•Content Relationships
–Hyperlinks, new metadata, aggregations
–Digital Libraries, personal collections
•Content acquires history
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