At least in OSM context there are several types of use of external data - import (adding object to database) - for example https://budynki.openstreetmap.org.pl

At least in OSM context there are several types of use of external data - import (adding object to database) - for example https://budynki.openstreetmap.org.pl/ https://budynki.openstreetmap.org.pl/ is used by OSM community in Poland to import official address and building data after review (sadly, quality makes necessary to review data but still saves time overall) - using for mapping (for example Bing aerial, Strava heatmap, aerial imagery released by many governments is also available on a compatible license) - linking (for example many OSM objects link Wikipedia articles about them or their official website) - used to find places for mapping (if Google starts showing new road I am not allowed to copy it into OSM - both due to licensing and low quality of Google data. But I can select this place for the next bicycle trip and map everything there as I survey this area) Not sure how it matches general terminology, OSM has some slang/terms which is sometime incompatible or unknown elsewhere.