Follows SPARQL 1.1 grammar
@ -2174,7 +2174,7 @@ parser! {
rule INTEGER() = ['0'..='9']+
rule DECIMAL() = ['0'..='9']+ "." ['0'..='9']* / ['0'..='9']* "." ['0'..='9']+
rule DECIMAL() = ['0'..='9']* "." ['0'..='9']+
rule DOUBLE() = (['0'..='9']+ "." ['0'..='9']* / "." ['0'..='9']+ / ['0'..='9']+) EXPONENT()