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A grammar for semantic annotations

Note that parenthesis ( )are part of the grammar language, e.g., ( ... )* means zero or more, ( ... )+ means one or more, and ( ... )? means zero or on.

AnnotGroup ::= ( Annot )+

Annot ::= ItemExp '==>' OntExp

ItemExp ::= '/' ItemPath

ItemPath ::= ElemName ( '' ItemCntxtExp '?' )* ( Var )? | ItemPath '/' ItemPath | '*' | '.'

Var ::= '{' '$' VarName '}'

ItemCntxtExp ::= ItemPath | ItemPath Op ItemValue

Op ::= '=' | '<' | '>' | ...

OntExp ::= ConceptName ( Var )? ( OntPath )?

OntPath ::= '.' RoleName ( '#' ConceptName )? ( Var )? ( OntPath )?