     |
| number number( object) | Returns the number representation of the object argument. |
| number number() | Returns the number representation of the context node. |
| number sum( node-set) | Returns the sum of all nodes in the node-set. |
| number floor( number) | Returns the largest integer value not greater than the argument. |
| number ceiling( number) | Returns the smallest integer value not less than the argument. |
| number round( number) | Returns the integer value closest to the argument. |