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Code Block
titleGrammar
Metadata               ::= ID "=" MetadataValue.
MetadataValue          ::= MetadataValueSingle | MetadataValueList | MetadataValueMap.
MetadataValueSingle    ::= INTEGER | Double | CHAR | STRING | BOOLEAN | QName.
MetadataValueList      ::= "[" (MetadataValue ("," MetadataValue)*)? "]".
MetadataValueMap       ::= "[" (MetadataValueMapEntry ("," MetadataValueMapEntry)*)? "]".
MetadataValueMapEntry  ::= MetadataValue ":" MetadataValue.

See operators in ODL or queries in QDL for examples.

Literals

Code Block
titleGrammar
Integer                 ::= (0..9)+.
Double                  ::= (0..9)* "." (0..9)+.
Boolean                 ::= ("true" | "false").
Char                    ::= "'" Unicode-Character "'".
String                  ::= '"' (Unicode-Character)* '"'.   
Range                   ::= (0..9)+ ".." (0..9)+.
List                    ::= "[" (Expression ("," Expression)*)? "]".  
Map                     ::= "[" (MapKeyValue ("," MapKeyValue)*)? "]".
MapKeyValue             ::= Expression ":" Expression.
Null                    ::= "null".

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