Key:tiger:CPI

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Public-images-osm logo.svg tiger:CPI
Osm element key.svg
Description
tag of unknown meaning and unclear purpose added by imports from official US sources Edit or translate this description.
Used on these elements
should not be used on nodesshould not be used on waysshould not be used on areasshould not be used on relations
Wikidata
Status: in use

Meaning of that tag is unclear[1] and it is dubious whatever it should be present on any object.

In http://www2.census.gov/geo/pdfs/maps-data/data/tiger/tgrshp2008/TGRSHP08.pdf it is defined as "Current urban area central place indicator" and restricted to be string of length 1.

In OSM database values tiger:CPI=Y and tiger:CPI=N clearly dominate[2] what suggests that it may be boolean value. Though it is not clear whatever yes/no applies to "Current" part, "urban" part or some other segment of definition.