[OSM-talk] Tag "AND_a_nosr_p" and source="AND"?

[Joseph Koshy]

I have seen the tags "AND_a_nosr_p=<NUMBER>" and "source=AND"
associated with some nodes in OpenStreetMap.  For example:

  http://www.openstreetmap.org/browse/node/245622615/history

Would anyone know what the context for these tags is?   I can't seem
to find documentation for the 'AND_a_nosr_p' tag, or the 'source=AND'
annotation in OpenStreetMap's wiki.

-- Koshy