service/datcol_command is a SAP Parameter attribute which is used to control Data collector command line information. This is available within R/3 SAP systems depending on the version and release level.
Below is the standard documentation available and a few details of the attributes values .
Data collector command that is executed by the start service during the
generation of a snapshot. This allows the data collector to store
additional artifacts in the snapshot for support purposes.
See SAP Parameter Documentation for full SAP documentation for this profile parameter.