Add CQL 1.2 / 2.0 YACC grammars

[yaz-moved-to-github.git] / src / cql2.0.y

diff --git a/src/cql2.0.y b/src/cql2.0.y
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+/* This file is part of the YAZ toolkit.
+ * Copyright (C) 1995-2010 Index Data
+ * See the file LICENSE for details.
+ */
+/*
+  YACC CQL grammar taken verbatim from the 2.0 draft (June 2010).
+ */
+%term PREFIX_NAME QUOTED_URI_STRING QUOTED_STRING AND OR NOT PROX SORTBY SIMPLE_STRING
+
+%%
+cql_query : query | query sort_spec;
+
+query : prefix_assignment search_clause_group | search_clause_group ;
+
+search_clause_group: search_clause_group boolean_modified subquery | subquery;
+
+subquery : '(' query ')' | search_clause;
+
+search_clause: index relation_modified search_term | search_term;
+
+search_term : SIMPLE_STRING | QUOTED_STRING;
+
+sort_spec : sort_by index_modified_list;
+
+sort_by: SORTBY;
+
+index_modified_list: index_modified_list index_modified | index_modified;
+
+prefix_assignment: '>' prefix '=' uri | '>' uri;
+
+prefix: SIMPLE_STRING;
+
+uri : QUOTED_URI_STRING;
+
+index_modified: index modifier_list | index;
+
+index : simple_name | PREFIX_NAME;
+
+relation_modified : relation modifier_list | relation;
+
+relation : relation_name | relation_symbol;
+
+relation_name: simple_name | PREFIX_NAME;
+
+relation_symbol : '=' | '>' | '<' ;
+
+boolean_modified : boolean modifier_list | boolean;
+
+boolean : AND | OR | NOT | PROX;
+
+modifier_list : modifier_list modifier | modifier;
+
+modifier : '/' modifier_name modifier_relation | '/' modifier_name;
+
+modifier_name: simple_name;
+
+modifier_relation : relation_symbol modifier_value;
+
+modifier_value : SIMPLE_STRING | QUOTED_STRING;
+
+simple_name: SIMPLE_STRING;
+
+%%