Each entry corresponds to a single span configuration profile. Each profile contains a set of span configuration parameters. The configuration parameters in a profile are applied to those lines referencing that profile (see the hdsl2ShdslSpanConfProfile object). Profiles may be created/deleted using the row creation/deletion mechanism via hdsl2ShdslSpanConfProfileRowStatus. If an active entry is referenced in hdsl2ShdslSpanConfProfile, the entry MUST remain active until all references are removed.