The (expected) path to the artifact on the local filesystem. An artifact which has this property set is assumed
to be not present in any regular repository and likewise has no artifact descriptor. Artifact resolution will
verify the path and resolve the artifact if the path actually denotes an existing file. If the path isn't valid,
resolution will fail and no attempts to search local/remote repositories are made.
The URL to a web page from which the artifact can be manually downloaded. This URL is not contacted by the
repository system but serves as a pointer for the end user to assist in getting artifacts that are not published
in a proper repository.