You can take a look at table SCMG_T_CASE_ATTR.
Also take a look at the attachment ! This is something we have picked up from the internet !
For the moment we still encounter problems with these extractors in delta mode. We are on relase 713, and we can not apply note 1741023 for the extractor 0CSM_CASE_LINKS. So we've launched an OSS-message today.
With the extractor 0CRM_CASE_ATTR we have problems with the category-GUID. Not easy to implement Case mangement in BW.