Since the launch of the Karst Information Portal in 2006 we have migrated through three different database architectures and platforms. We undertook these migrations to address comments and suggestions from the users of the KIP. We are now engaged in the fourth migration, this time to the SobekCM digital repository platform (http://sobekrepository.org). This decision follows a careful consideration of a host of available open source alternatives. Three concerns informed this decision: 1) input from KIP users (i.e.