This is a simple that uses HaskellDB and Haskell XML-RPC to create
query a database containing the data from Foldoc. There are command
line programs for building querying the database and an XML-RPC server
that provides a metod for quering the database.


* Get FOLDOC as a text file:

rsync --times --progress rsync://foldoc.doc.ic.ac.uk:8873/foldoc/Dictionary .


* Create database tables:

CREATE TABLE foldoc_entries (	
  heading VARCHAR(255) NOT NULL, 
  body TEXT NOT NULL,
  last_updated DATE NULL,		    
  KEY (heading)
);

CREATE TABLE foldoc_entry_subjects (
  heading VARCHAR(255) NOT NULL,
  subject VARCHAR(255) NOT NULL,
  KEY (heading),
  KEY (subject)
);


heading should be primary key in foldoc_entries, but MySQL does 
case-insensitive matching on varchar, so that doesn't work.

* Build database definition:

DbDirect <driver> <opts> FoldocDB


* Compile:

$ make

or

$ ghc --make -o insert insert.hs
$ ghc --make -o query query.hs
$ ghc --make -o query foldocServer.hs


* Insert data:

./insert


* Make foldocServer available to the web server.


* Test:

$ ghci

Prelude> (Network.XmlRpc.Client.remote "http://localhost/~bjorn/cgi-bin/foldocServer" "foldoc.getEntries" "Haskell" :: IO [String]) >>= mapM_ putStrLn