Minor improvements to indexing.

README.md

@@ -1,6 +1,12 @@
 # elboob
 
-A site search engine for Cryogen with search on the client side
+A site search engine for [Cryogen](http://cryogenweb.org/) with search on the client side
+
+## Justification
+
+Left, of course.
+
+More seriously `elboob` is as near as I can get to an inversion of Google.
 
 ## Design intention
 
@@ -32,7 +38,12 @@ Then the output should be
 
  ## Implementation
 
- Has not started yet.
+ Is at an early stage. I have a working indexer, which conforms to the specification given above. There are problems with it:
+
+ 1. It contains many many repetitions of long file path names, which results in a large data size (although it make it efficient to search);
+ 2. It doesn't contain human readable metadata about the files, which, given this is Cryogen and the files have metadata headers, it easily could.
+
+ I could assign a gensym to each file path name, store that gensym in the main index, add a separate dictionary map entry to the index which translated those gensyms into the full file paths. That would substantially reduce the file size without greatly increasing the cost of search. 
 
  ## License