RDF.XSD.Numeric.multiply

You're seeing just the function multiply, go back to RDF.XSD.Numeric module for more information.

Multiplies two numeric literals.

For xsd:float or xsd:double values, if one of the operands is a zero and the other is an infinity, NaN is returned. If one of the operands is a non-zero number and the other is an infinity, an infinity with the appropriate sign is returned.

If one of the given arguments is not a numeric literal or a value which can be coerced into a numeric literal, nil is returned.

see http://www.w3.org/TR/xpath-functions/#func-numeric-multiply