On the 6 82 weeks charting in the Netherlands, and was certified platinum for sales of 60,000 copies. "On the 6" was moderately successful in Australia, where it debuted (and peaked) at number 11 on July 18, 1999. In 2002 it was certified platinum by the Australian Recording Industry Association for selling 70,000 copies. "On the 6" peaked at number 14 in the United Kingdom, and was certified platinum by the British Phonographic Industry for sales of over 300,000 copies. The album entered the French album chart at number 24 on July 3, 1999, peaking at number 15 two weeks later. It spent
International Standard Authority Data Number a good portion of time on conceptualizing an international standard number "that will facilitate the linkage of variant authorities for the same identity." Their discussion was very complex in its discussion of which agencies would actually assign such numbers. For example, a national library might be tasked with assigning identifiers to authors within its country, but this would lead to duplicate identifiers for authority data that describe transnational people. The project was ultimately determined to be unfeasible. Tillett suggested that the cluster identifiers used by the Virtual International Authority File might meet the needs expressed in the proposal. The concept