To be covered by Intro Group:
	* What is information?
	* What is an information object?

A. REPRESENTATION
Objects considered by IR:
	* anything carrying meaning
	* text
		- varying in size
		- varying in explicitness of structure
	* multimedia

Types of representation of  objects
	* object itself
	* its summary
	* its metadata
	* feature vectors
	* statement in a language (Boolean algebra, predicate logic, ...)

Types of representation of queries/profiles
	* as an information object
	    + a description
		- as a description of an information need
	* as a search constraint

Information spaces
    Elements (in vocabularies)
	* strings (simple, compound - phrases)
	* tokens, terms (simple, compound, abstractions)
	* documents
    Organizations
	* pairs (phrases)
	* collections (lists)
	* relational structures (doc + metadata)
	* complex structures (thesauri)
	* grammar-based organizations

Modeling uncertainty
	* term weighting
	* belief

B. DOMAIN VIEWS
Coverage
	* Type of document representation
	* Type of query representation
	* What information spaces are considered
	* Types of uncertainty considered
Family Packages
	* Matching (exact, approximate, partial)
	* Boolean
	* Extended Boolean
	* Vector space
	* Probabilistic
	* Grammar-based
	* Logical (deductive, inferential)


C. PROCESSING
Deriving representations
  Indexing
	* discarding
	* term assignment
	* term weighting
  Analysis
  Extracting
  Summarizing

Combining evidence methods
	* matching
	* probability
	* (fuzzy) logic
	* constraint satisfaction

Processing Agents and their Methods
	* People
	* Search engines
	* Agents

Interaction
	* feedback
	* iteration
	* selection
	* presentation
	* explanation
	* visualization