Overpass API EBNF

Es gibt kein offizielles EBNF für Overpass QL. Für Syntax-Beispiele siehe Overpass_API und Overpass_API_by_Example.

Hier ein erster Versuch (Version 0.2):

(* Overpass QL EBNF Grammar *) (* Query *) query  ::= ( global_option )* ( statement )+ ( output_statement )* (* Global Options *) global_option  ::= '[' option ( ';' option )* ']' option  ::= 'out:' format | 'timeout:' number | 'maxsize:' number | 'bbox:' bbox | 'date:' date | 'diff:' date ',' date | 'resolve-aliases:' boolean | 'force:' boolean boolean  ::= 'true' | 'false' (* Statements *) statement  ::= fetch_statement | area_statement | assignment_statement | union_statement | difference_statement | intersection_statement | recurse_statement | foreach_statement | if_statement | print_statement | make_statement | count_statement (* Fetch Statement *) fetch_statement  ::= element_type ( filter )* ( search_area )? ( ';' | '{' ( statement )+ '}' ) element_type  ::= 'node' | 'way' | 'relation' | 'nwr' (* Filters *) filter  ::= '[' attribute_filter ']' | '[' attribute_regexp_filter ']' | '[' attribute_negation_filter ']' | '(' bounding_clause ')' | '[if:' condition ']' attribute_filter  ::= key operator value attribute_regexp_filter::= key operator_regex regex_value attribute_negation_filter ::= '!' key operator  ::= '=' | '!=' operator_regex  ::= '~' | '!~' regex_value  ::= '"' regex_pattern '"' (* Bounding Clause *) bounding_clause  ::= bbox | 'around' ':' radius ( ',' lat ',' lon )? | 'poly' ':' '"' coordinates '"' (* Search Area *) search_area  ::= '(' area_selector ')' area_selector  ::= 'area' ( '.' variable )? | 'area' '(' query ')' (* Assignment Statement *) assignment_statement  ::= variable '=' expression ';' expression  ::= fetch_statement | union_statement | difference_statement | intersection_statement | recurse_statement | '(' statement_list ')' (* Union Statement *) union_statement  ::= '(' statement_list ')' statement_list  ::= statement ( ';' statement )* ( ';' )? (* Difference Statement *) difference_statement  ::= '(' statement ';' '-' statement ( ';' )? ')' (* Intersection Statement *) intersection_statement ::= '(' statement ';' statement ( ';' )? ')' (* Recurse Statement *) recurse_statement  ::= ( variable ':' )? element_type recurse_operator ';' recurse_operator  ::= '>' | '<' | '<<' | '>>' | '>' letter (* Foreach Statement *) foreach_statement  ::= 'foreach' '(' variable ')' '{' ( statement )+ '}' (* If Statement *) if_statement  ::= 'if' '(' condition ')' '{' ( statement )+ '}' (* Print Statement *) print_statement  ::= 'print' ( variable )? ( output_modifiers )* ';' (* Make Statement *) make_statement  ::= 'make' 'area' '(' statement ')' '->' variable ';' (* Count Statement *) count_statement  ::= 'count' '(' element_type ')' ';' (* Area Statement *) area_statement  ::= 'area' area_filter '->' variable ';' area_filter  ::= '[' attribute_filter ']' (* Output Statement *) output_statement  ::= 'out' output_modifiers* ';' output_modifiers  ::= 'body' | 'skel' | 'tags' | 'meta' | 'geom' | 'center' | 'ids' | 'qt' | 'count' | 'bb' (* Variable *) variable  ::= '.' identifier (* Identifier *) identifier  ::= letter ( letter | digit | '_' )* (* Key and Value *) key  ::= '"' identifier '"' value  ::= '"' string '"' (* Condition *) condition  ::= logical_expression logical_expression  ::= logical_term ( ( 'and' | 'or' ) logical_term )* logical_term  ::= '(' logical_expression ')' | comparison comparison  ::= expression comparison_operator expression comparison_operator  ::= '=' | '!=' | '>' | '<' | '>=' | '<=' (* Expressions *) expression  ::= variable | function_call | value | number function_call  ::= function_name '(' ( expression ( ',' expression )* )? ')' function_name  ::= identifier (* Numbers and Strings *) number  ::= digit+ ( '.' digit+ )? digit  ::= '0'..'9' letter  ::= 'a'..'z' | 'A'..'Z' string  ::= character* character  ::= any character except '"' regex_pattern  ::= character* (* Bounding Box and Coordinates *) bbox  ::= number ',' number ',' number ',' number radius  ::= number lat  ::= number lon  ::= number coordinates  ::= number ( ' ' number )+ ( ',' number ( ' ' number )+ )* (* Date *) date  ::= '"' iso8601_date '"' iso8601_date  ::= year '-' month '-' day 'T' hour ':' minute ':' second 'Z' year  ::= digit digit digit digit month  ::= digit digit day  ::= digit digit hour  ::= digit digit minute  ::= digit digit second  ::= digit digit (* Format *) format  ::= 'json' | 'xml' | 'csv' | 'popup' (* Terminals *) character  ::= any character except '"'