Add CQL 1.2 / 2.0 YACC grammars

[yaz-moved-to-github.git] / src / cql1.2.y

diff --git a/src/cql1.2.y b/src/cql1.2.y
new file mode 100644 (file)
index 0000000..0a908ec
--- /dev/null
+++ b/src/cql1.2.y
@@ -0,0 +1,59 @@
+/* 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 official 1.2 spec
+ */
+%term GE LE NE AND OR NOT PROX CHARSTRING1 CHARSTRING2 SORTBY
+
+%%
+sortedQuery : prefixAssignment sortedQuery 
+            | scopedClause
+            | scopedClause SORTBY sortSpec;
+
+sortSpec : sortSpec singleSpec | singleSpec;
+singleSpec : index modifierList | index ;
+
+cqlQuery : prefixAssignment cqlQuery | scopedClause;
+
+prefixAssignment : '>' prefix '=' uri | '>' uri;
+
+scopedClause : scopedClause booleanGroup searchClause | searchClause ;
+
+booleanGroup: boolean | boolean modifierList;
+
+boolean : AND | OR | NOT | PROX ;
+
+searchClause : '(' cqlQuery ')'
+             | index relation searchTerm
+            | searchTerm
+            ;
+
+relation : comparitor | comparitor modifierList;
+
+comparitor : comparitorSymbol | namedComparitor ;
+
+comparitorSymbol : '=' | '>' | '<' | GE | LE | NE;
+
+namedComparitor : identifier;
+
+modifierList : modifierList modifier  | modifier;
+
+modifier : '/' modifierName 
+         | '/' modifierName comparitorSymbol modifierValue
+        ;
+     
+
+prefix : term;
+uri : term;
+modifierName: term;
+modifierValue: term;
+searchTerm: term;
+index: term;
+
+term: identifier | AND | OR | NOT | PROX | SORTBY ;
+
+identifier: CHARSTRING1 | CHARSTRING2;
+
+%%