/* converted on Thu May 10, 2012, 22:39 (UTC+02) by bison-to-w3c v0.27.400 which is Copyright (c) 2011-2012 by Gunther Rademacher <grd@gmx.net> */

query    ::= statement_block_statement* return_statement
statement_block_statement
         ::= for_statement
           | let_statement
           | filter_statement
           | collect_statement
           | sort_statement
           | limit_statement
for_statement
         ::= T_FOR variable_name T_IN expression
filter_statement
         ::= T_FILTER expression
let_statement
         ::= T_LET variable_name T_ASSIGN expression
collect_statement
         ::= T_COLLECT collect_element ( T_COMMA collect_element )* optional_into
collect_element
         ::= variable_name T_ASSIGN expression
           | expression
optional_into
         ::= ( T_INTO variable_name )?
sort_statement
         ::= T_SORT sort_element ( T_COMMA sort_element )*
sort_element
         ::= expression sort_direction
sort_direction
         ::= ( T_ASC | T_DESC )?
limit_statement
         ::= T_LIMIT signed_number
           | T_LIMIT signed_number T_COMMA signed_number
return_statement
         ::= T_RETURN expression
expression
         ::= T_OPEN expression T_CLOSE
           | T_OPEN query T_CLOSE
           | operator_unary
           | operator_binary
           | operator_ternary
           | T_STRING T_OPEN optional_function_call_arguments T_CLOSE
           | compound_type
           | atomic_value
           | T_STRING ( '.' T_STRING | T_LIST_OPEN expression T_LIST_CLOSE )* ( T_EXPAND ( '.' T_STRING | T_LIST_OPEN expression T_LIST_CLOSE )+ )*
operator_unary
         ::= T_PLUS expression
           | T_MINUS expression
           | T_NOT expression
operator_binary
         ::= expression T_OR expression
           | expression T_AND expression
           | expression T_PLUS expression
           | expression T_MINUS expression
           | expression T_TIMES expression
           | expression T_DIV expression
           | expression T_MOD expression
           | expression T_EQ expression
           | expression T_NE expression
           | expression T_LT expression
           | expression T_GT expression
           | expression T_LE expression
           | expression T_GE expression
           | expression T_IN expression
operator_ternary
         ::= expression T_QUESTION expression T_COLON expression
optional_function_call_arguments
         ::= ( expression ( T_COMMA expression )* )?
compound_type
         ::= list
           | array
list     ::= T_LIST_OPEN optional_list_elements T_LIST_CLOSE
optional_list_elements
         ::= ( expression ( T_COMMA expression )* )?
array    ::= T_DOC_OPEN optional_array_elements T_DOC_CLOSE
optional_array_elements
         ::= ( array_element ( T_COMMA array_element )* )?
array_element
         ::= array_element_name T_COLON expression
atomic_value
         ::= value_literal
           | bind_parameter
value_literal
         ::= T_QUOTED_STRING
           | T_NUMBER
           | T_NULL
           | T_TRUE
           | T_FALSE
bind_parameter
         ::= T_PARAMETER
array_element_name
         ::= T_STRING
           | T_QUOTED_STRING
variable_name
         ::= T_STRING
signed_number
         ::= T_NUMBER
           | '-' T_NUMBER