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| − | <pre>
| + | Es gibt keine EBNF Spezifikatikon für die Overpass QL. Roland weiss sicher mehr :-). |
| − | (* Overpass QL EBNF Grammar, experimental Version 0.2 by Stefan Keller *)
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| | | | |
| − | (* Query *)
| + | Da bleibt nur ChatGPT & Co und "Learning by Example": siehe [[Overpass_API]] und v.a. [https://wiki.openstreetmap.org/wiki/Overpass_API/Overpass_API_by_Example Overpass_API_by_Example]. |
| − | query ::= ( global_option )* ( statement )+ ( output_statement )*
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| | | | |
| − | (* Global Options *)
| + | Hier ein erster eigener Versuch als [https://gist.githubusercontent.com/sfkeller/43800cd64014d17c55e40fa5e877fd6a/raw/3410bd8817e47c86e5695388a96ba1db5c0630a7/Overpass_QL_EBNF_v0.2_ChatGPT_generated.txt Github Gist File]. |
| − | global_option ::= '[' option ( ';' option )* ']'
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| − | option ::= 'out:' format
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| − | | 'timeout:' number
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| − | | 'maxsize:' number
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| − | | 'bbox:' bbox
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| − | | 'date:' date
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| − | | 'diff:' date ',' date
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| − | | 'resolve-aliases:' boolean
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| − | | 'force:' boolean
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| | | | |
| − | boolean ::= 'true' | 'false'
| + | [[Kategorie:OpenStreetMap]] |
| − | | + | [[Kategorie:Overpass]] |
| − | (* Statements *)
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| − | statement ::= fetch_statement
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| − | | area_statement
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| − | | assignment_statement
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| − | | union_statement
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| − | | difference_statement
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| − | | intersection_statement
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| − | | recurse_statement
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| − | | foreach_statement
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| − | | if_statement
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| − | | print_statement
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| − | | make_statement
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| − | | count_statement
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| − | | |
| − | (* Fetch Statement *)
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| − | fetch_statement ::= element_type ( filter )* ( search_area )? ( ';' | '{' ( statement )+ '}' )
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| − | | |
| − | element_type ::= 'node' | 'way' | 'relation' | 'nwr'
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| − | | |
| − | (* Filters *)
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| − | filter ::= '[' attribute_filter ']'
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| − | | '[' attribute_regexp_filter ']'
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| − | | '[' attribute_negation_filter ']'
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| − | | '(' bounding_clause ')'
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| − | | '[if:' condition ']'
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| − | | |
| − | attribute_filter ::= key operator value
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| − | attribute_regexp_filter::= key operator_regex regex_value
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| − | attribute_negation_filter ::= '!' key
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| − | | |
| − | operator ::= '=' | '!='
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| − | operator_regex ::= '~' | '!~'
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| − | regex_value ::= '"' regex_pattern '"'
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| − | | |
| − | (* Bounding Clause *)
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| − | bounding_clause ::= bbox
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| − | | 'around' ':' radius ( ',' lat ',' lon )?
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| − | | 'poly' ':' '"' coordinates '"'
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| − | | |
| − | (* Search Area *)
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| − | search_area ::= '(' area_selector ')'
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| − | | |
| − | area_selector ::= 'area' ( '.' variable )?
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| − | | 'area' '(' query ')'
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| − | | |
| − | (* Assignment Statement *)
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| − | assignment_statement ::= variable '=' expression ';'
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| − | | |
| − | expression ::= fetch_statement
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| − | | union_statement
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| − | | difference_statement
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| − | | intersection_statement
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| − | | recurse_statement
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| − | | '(' statement_list ')'
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| − | | |
| − | (* Union Statement *)
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| − | union_statement ::= '(' statement_list ')'
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| − | | |
| − | statement_list ::= statement ( ';' statement )* ( ';' )?
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| − | | |
| − | (* Difference Statement *)
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| − | difference_statement ::= '(' statement ';' '-' statement ( ';' )? ')'
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| − | | |
| − | (* Intersection Statement *)
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| − | intersection_statement ::= '(' statement ';' statement ( ';' )? ')'
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| − | | |
| − | (* Recurse Statement *)
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| − | recurse_statement ::= ( variable ':' )? element_type recurse_operator ';'
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| − | | |
| − | recurse_operator ::= '>' | '<' | '<<' | '>>' | '>' letter
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| − | | |
| − | (* Foreach Statement *)
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| − | foreach_statement ::= 'foreach' '(' variable ')' '{' ( statement )+ '}'
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| − | | |
| − | (* If Statement *)
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| − | if_statement ::= 'if' '(' condition ')' '{' ( statement )+ '}'
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| − | | |
| − | (* Print Statement *)
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| − | print_statement ::= 'print' ( variable )? ( output_modifiers )* ';'
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| − | | |
| − | (* Make Statement *)
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| − | make_statement ::= 'make' 'area' '(' statement ')' '->' variable ';'
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| − | | |
| − | (* Count Statement *)
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| − | count_statement ::= 'count' '(' element_type ')' ';'
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| − | | |
| − | (* Area Statement *)
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| − | area_statement ::= 'area' area_filter '->' variable ';'
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| − | | |
| − | area_filter ::= '[' attribute_filter ']'
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| − | | |
| − | (* Output Statement *)
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| − | output_statement ::= 'out' output_modifiers* ';'
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| − | output_modifiers ::= 'body' | 'skel' | 'tags' | 'meta' | 'geom' | 'center' | 'ids' | 'qt' | 'count' | 'bb'
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| − | | |
| − | (* Variable *)
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| − | variable ::= '.' identifier
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| − | | |
| − | (* Identifier *)
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| − | identifier ::= letter ( letter | digit | '_' )*
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| − | | |
| − | (* Key and Value *)
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| − | key ::= '"' identifier '"'
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| − | value ::= '"' string '"'
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| − | | |
| − | (* Condition *)
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| − | condition ::= logical_expression
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| − | logical_expression ::= logical_term ( ( 'and' | 'or' ) logical_term )*
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| − | logical_term ::= '(' logical_expression ')'
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| − | | comparison
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| − | comparison ::= expression comparison_operator expression
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| − | | |
| − | comparison_operator ::= '=' | '!=' | '>' | '<' | '>=' | '<='
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| − | | |
| − | (* Expressions *)
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| − | expression ::= variable
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| − | | function_call
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| − | | value
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| − | | number
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| − | | |
| − | function_call ::= function_name '(' ( expression ( ',' expression )* )? ')'
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| − | function_name ::= identifier
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| − | | |
| − | (* Numbers and Strings *)
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| − | number ::= digit+ ( '.' digit+ )?
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| − | digit ::= '0'..'9'
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| − | letter ::= 'a'..'z' | 'A'..'Z'
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| − | string ::= character*
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| − | character ::= any character except '"'
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| − | | |
| − | regex_pattern ::= character*
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| − | | |
| − | (* Bounding Box and Coordinates *)
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| − | bbox ::= number ',' number ',' number ',' number
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| − | radius ::= number
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| − | lat ::= number
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| − | lon ::= number
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| − | coordinates ::= number ( ' ' number )+ ( ',' number ( ' ' number )+ )*
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| − | | |
| − | (* Date *)
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| − | date ::= '"' iso8601_date '"'
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| − | iso8601_date ::= year '-' month '-' day 'T' hour ':' minute ':' second 'Z'
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| − | year ::= digit digit digit digit
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| − | month ::= digit digit
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| − | day ::= digit digit
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| − | hour ::= digit digit
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| − | minute ::= digit digit
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| − | second ::= digit digit
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| − | | |
| − | (* Format *)
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| − | format ::= 'json' | 'xml' | 'csv' | 'popup'
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| − | | |
| − | (* Terminals *)
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| − | character ::= any character except '"'
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| − | </pre>
| |
Es gibt keine EBNF Spezifikatikon für die Overpass QL. Roland weiss sicher mehr :-).
