|Typically used as key:noref=yes to explicitly state that there exists no meaningful value for key:ref=* tag for an object.
|Used on these elements
|Status: in use
|Tools for this tag
For example: For unnumbered highway exits highway=motorway_junction (e.g. to rest areas) in highway systems where exits are normally numbered, use noref=yes to explicitly note that the ref=* tag is not missing, but rather that no such value exists for that node.