process class Organization Property Type: computation class well log tool class well log curve class parameter specification company process class: a class of process identified by a given company-defined identifier (typically restricted to non-acquisition processes). well log service class: a class of well log acquisition process, implemented by one or more tool series with a common industry-designated tool class, producing the same or similar outputs (characterized by a common or typical set of channel classes). Where a tool series is associated with a unique set of channels, the service is equivalent to the <well log tool series>; otherwise the service corresponds to an <abstract tool class> which is implemented by multiple tool series. company channel class: a class of well log channel with a given identifier, and the characteristics of channels recorded under that identifier. company parameter specification: the company-specificed definition of a parameter with a given identifier. well log tool class service channel intersection: the association of a data item (channel or parameter) with the process (acquisition or computation) by which it is produced or consumed.

Schema for PWLS Reference Data [PPT]