Observations on Search Engines meeting requirements

• Accuracy is hard to establish, though statistical systems are in general superior to Boolean ones
• Only RetrievalWare allows you to search for images by color and texture
  • applies to severely degraded OCR text
• Several systems offer integration with structured dbs (TOPIC, PLS, OpenText , Oracle)
  • “tuples” versus “docs”: Substantial issues in terms of integrated queries and indexing (cf. MITRE’s current DIA project)

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