Assertion: command's option | /r/HasProperty | useful
Facets:
value: for creating archives
type: PURPOSE
Source sentences:
text: Two hyphen-minus characters without following letters ( -- ) may indicate that the remaining arguments should not be treated as options, which is useful for example if a file name itself begins with a hyphen, or if further arguments are meant for an inner command (e.g., sudo).
text: The -a option preserves as much of the structure and attributes of the original directory and its contents as possible in the new directory and is thus useful for creating archives.