This model refines ITIL’s idea of a CMDB by breaking up the CMDB and its infrastructure into three layers. These are the CMDB itself; related data linked to or from the CMDB, called the CMDB ...

Case in point is this post from Kjell-Sverre Jerijærvi who points out the need and the notion of a common or Canonical "Data" Model. "An important topic when designin. Topics ...