Tagging note: should is_sidepath:of:wikidata=* be explicitly accepted as an alternative to, or in addition to, is_sidepath:of:name=* when the primary carriageway/road has a wikidata= entry?
is_sidepath:of:wikidata=*
is_sidepath:of:name=*
wikidata=
Also, note this new topic for a UK-specific guidance draft: