(Don't rely on this list being complete!)

+ Documentation
  Web Site - Mechanism / production

+ Identify API & SPI

+ Query prepare
  + Check for groups of one and remove?
  + Combine adjacent ElementGroups (ditto templates)
  + Expression optimization
  + Remove ElementTriplePattern??
     + merge code into ElementBasePattern
     + ElementGroup inserts an ElementBasePattern when a triple arrives
       or uses existing (front) one.
       All tyed to mark() handling

+ Core
  + DESCRIBE handler framework (c.f. Joseki/fetch)
  + Check use of initial iterator being null
  + QueryElement is the interface, Element the base impl
    The parsers use Element a lot but does much of the code
    think "Element" rather than "QueryElement"?

+ Engine
  + Need to ensure models are loaded once (per query execution - and wider)
  + Integrate a meta-model (GRAPH SYSTEM or similar design)

+ Serializer
  + Better name?  "serialize"
  + Add a QueryVisitor and use this to print.
  + Remove asInfixString, asPrefixString?
  + Separate out a "FormatterContext" from Query
  	    PrefixMap, BNodeNodeToLabelMap
    (or incorporate into Query)

+ Evaluation
  "Not equals" is not simply not(equals())
    equals = known to be equal
    not equals = known to be not equal
  
+ Function
  + Extensions via lib - then look up function URI
    where there is URI=>class c.f. "java:myApp.myFunction" or ext:
    
+ Query class : reorganise into methods-by-type (and maybe split).
  + Minimal Query class in API
    + core.QueryBase - all the internal stuff.
      No - would need downcasting.
      Query extends core.QueryBase 
  + Split out Query.init so Query class is "pure"?

+ Application framework
  + Commands
    + Print RS (graph/XML => table etc etc)
    + Reorg QueryContext/RunQuery to be one class, no expection handling,
      then have a command line wrapper for exceptions.
      Serializable + JevaBean-ification.
  + Modular formatter.
    Plug-ins for formats.

Results Formatting
  + Use ResultSetProcessor in ResultSetFormatter
  + ResultSetFormatter.format(results)
    ResultSetFormatter.format(results, processor)
      String myQuery = ...;
      Query query = QueryFactory.getQuery( myQuery );
      ResultSet results = query.exec();
      ResultSetFormatter.format(results, new CustomResultSetProcessor());

+ ARQ / language
  + FROM / FROM NAMED
  + UNSAID
  + Features (futures): SERVICE

+ Parsers
  + Version of RDQL for this query engine "USING" via a fixup list.
    
+ Build
  Check dist/ tree

+ Repackage??
  ...jena.query
  ...jena.query.core          -- The AST, visitor pattern
  ...jena.query.exec          -- Query execution interfaces
  ...jena.query.engine        -- QueryEngine ,  bindings and iterators 
  ...jena.query.format        -- presentation
  ...jena.query.unparse       -- query to string
  ...jena.query.serialize     -- alt 
  ...jena.query.parse         -- string to query
  ...jena.query.parse.<lang>