<Id>::=[ 'A-Z' | 'a-z' ][ 'A-Z' | 'a-z' | '0-9' | \- | _ | \' ]*
<Uri>::=<Conuri> | <Varuri> | <Indtyuri> | <Indconuri>
<Conuri>::="cic:/" [<Id "/" ]*<Id> ".con"
<Varuri>::="cic:/" [<Id> "/" ]*<Id> ".var"
<Indtyuri>::="cic:/" [<Id> "/" ]*<Id> ".ind#1/" ['0-9']+
<Indconuri>::="cic:/" [<Id> "/" ]*<Id> ".ind#1/" ['0-9']+ "/" ['0-9']+
<Exp_Named_Subst>::="{" [ [ [<Id> | <Varuri> ] ":=" <Expression> ";" ]* [ [<Id> | <Varuri> ] ":=" <Expression> ] ]? "}"