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3. Macrotext
3.1 Macrotext history
3.1.1 Paper indices
3.1.2 Memex
3.1.3 Online bibliographies
3.2 Macrotext principles
3.2.1 Word-based principles
3.2.1.1 String methods
3.2.1.1.1 Indices
3.2.1.1.2 String ambiguity
3.2.1.2 Word frequency principles
3.2.1.2.2 Word frequency indexing
3.2.1.2.2 Word frequency retrieval
3.2.1.2.3 Document clusters
3.2.2 Indexing language principles
3.2.2.1 Indexing
3.2.2.2 Thesaurus
3.2.2.3 Thesaurus construction
3.2.2.3.1 Thesaurus construction group
3.2.2.3.2 Word frequency thesaurus construction
3.2.3 Retrieval interface
3.2.4 Retrieval usability
3.2.5 Macrotext evaluation
3.2.5.1 Document acquisition
3.2.5.2 Indexing and thesaurus evaluation
3.2.5.3 Retrieval evaluation
3.3 Macrotext systems
3.3.1 Text database systems
3.3.2 Online bibliographic system
3.3.3 Word-based systems
3.3.3.1 String search systems
3.3.3.2 Word frequency systems
3.3.4 Indexing language systems
3.3.4.1 Preserved context system
3.3.4.2 Thesaurus system
3.3.4.2.1 Electronic Yellow Pages
3.3.4.2.2 MEDLARS
3.3.4.2.3 Graphical traversal
3.3.5 Large volume microtext
3.3.5.1 IDEX
3.3.5.2 Reference book searching
3.4 Hypertext to hypertext
3.4.1 Translating languages
3.4.2 Mapping
3.4.3 Merging semantic nets
3.5 Macrotext requirements
3.6 Macrotext exercises