LBTESTCD Assigned, eDT, CRF?

Hi !

Since I am pretty new to this define.xml / SDTM topic I do have a dozen of questions. In the define.xml I am listing the LBTESTCD (and other xxTESTCD) into the VLM section. For each LBTEST I assigned a LBTESTCD accordingly which is also listed in the CRF. The source data also contains the mostly correct LBTESTCD's (some of them I had to change though), so what exactly is my "origin" of LBTESTCD then? Assigned, eDT, CRF? Since the LBTESTCD is not directly mentioned in the original CRF, I would assume that CRF is wrong.

Thanks for your help in advance!