Creates a new target by parsing the specified URL.
Creates a new target by parsing the specified URL.
If the target is an absolute URL (starting with 'http:'/'https:'/'mailto:') the
result will be an external target.
Relative URLs will be interpreted as pointing to the target within the virtual tree of input and output
documents and will be validated during transformation,
resulting in errors if the target does not exist.
External targets on the other hand are not validated,
as the availability of the external resource during validation cannot be guaranteed.