anchor.diff:  90, "Unsupported direction value" 
   91, "Unsupported case value" 
   92, "Unsupported missing value action" 
  +93, "Sort ended due to missing value"
   100, "Explain not supported" 
   101, "Explain request type not supported (SOAP vs GET)" 
   102, "Explain record temporarily unavailable"
  
positive.code: "$Id: srw.csv,v 1.2 2005-04-22 15:14:24 adam Exp $"
  1, "Permanent system error" 
  2, "System temporarily unavailable" 
  3, "Authentication error" 
  
negative.code: 32, "Anchoring character in unsupported position" 
  33, "Combination of proximity/adjacency and masking characters not supported" 
  34, "Combination of proximity/adjacency and anchoring characters not supported" 
  35, "Term contains only stopwords" 
  36, "Term in invalid format for index or relation" 
  37, "Unsupported boolean operator" 
  38, "Too many boolean operators in query" 
  