Does anybody know if there is any power function added for SPARQL?
My quick-fix is using BIND and string process but it's not optimal at all:
?contract part:price ?price_E ;
part:Currency ?currency .
BIND(strafter(str(?price_E), "E") as ?E)
BIND(replace(strbefore(str(?price_E), "E"), "\[.\]", "") as ?nodot)
BIND(substr(?nodot, 0, xsd:integer(?E)+2) as ?first)
BIND(substr(?nodot, xsd:integer(?E)+2, 2) as ?second)
BIND(concat(?first, ".", ?second) as ?price)
Example of input and output data: Input 1.51535E3 Output 1515.35
Sadly, the answer is no. As of SPARQL 1.1, the current W3C version, there is no exponentiation operator. You can accomplish it with repeated multiplication (x*x) as in:
(COUNT(?items)*COUNT(?items)
However, in your example, it is not clear that you actually need to do any arithmetic. The input 1.51535E3 is in fact already equal to 1515.35 because it is valid scientific notation, which SPARQL supports.