Core concepts

• Concurrency
  • Threading
• Indexing concepts
  • Databases
  • Documents
  • Terms
  • Term Generator
  • Using identifiers with Xapian
  • Values
  • Index limitations
• Search concepts
  • Queries
  • Query Parser
  • Ranked matches
  • Search-time Limitations
• Introduction to IR
  • Indexing: Offline processing
  • Retrieval: Online processing
  • References