Old versions of GILS tables

[yaz-moved-to-github.git] / README

diff --git a/README b/README
index 690f247..42da23a 100644 (file)
--- a/README
+++ b/README
@@ -1,5 +1,5 @@
 
- * Copyright (C) 1995, Index Data.
+ * Copyright (C) 1995-1997, Index Data.
  * See the file LICENSE for details.
  * Sebastian Hammer, Adam Dickmeiss
 
@@ -31,9 +31,35 @@ the DANBIB test target, you might use:
 
 client osi:0103/find2.denet.dk:4500
 
-Client supports CCL-queries, with the mapping between qualifiers and
-attribute values specified in the file default.bib in the working
-directory. Use '?' to get a list of the available commands.
+Use '?' to get a list of the available commands.
+
+The current query language is a bit awkward, but functional:
+
+query     ::= ['@attrset' <attribute-set>] rpn
+rpn       ::= complex | simple | attr rpn
+complex   ::= operator rpn rpn
+operator  ::= '@and' | '@or' | '@not' | '@prox' proximity
+simple    ::= term | set.
+term      ::= <word> | '"' <term> ... '"'.
+set       ::= '@set' <setname>.
+attr      ::= '@attr' [<attribute-set>] <number> '=' <number>.
+proximity ::= exclusion distance ordered relation which unit
+exclusion ::= '1' | '0' | 'void'
+distance  ::= <number>
+ordered   ::= '1' | '0'
+relation  ::= <number>
+which     ::= 'known' | 'private'
+unit      ::= <number>
+
+Eg.:
+
+Andersen
+
+"Hans Andersen"
+
+@and @attr 1=1 andersen @attr 1=4 @attr 4=2 duckling
+
+@attrset Bib-1 @and @attr GILS 2=2008 Washington @attr 1=21 weather
 
 The directories:
 
@@ -53,7 +79,7 @@ asn     - This module implements the Z39.50/SR protocol. The best way
        which defines structure and type definitions for each of the
        types introduced in the protocol specification.
 
-yazlib  - This module implements the transport transparency
+comstack- This module implements the transport transparency
        stack (COMSTACK). The comstack implements a generic interface
        for exchanging BER-encoded records over a network. It supports
        the 'American' mode of exchanging the records straight over