The DBDOC CLEAN.TXT file lists the error types which did NOT occur in your build.
For example:
No errors were found for the following categories: DBDOC-.ERR DBDOC-CHECK_ADAPT_BLOCK_0.ERR DBDOC-CHECK_ADAPTED_COORDINATE.ERR DBDOC-CHECK_ADAPTED_RUNG.ERR DBDOC-CHECK_AIS-FBS_TRIP_ON_FAULT.ERR DBDOC-CHECK_ALARM_VECTOR.ERR DBDOC-CHECK_BATCH_NO_INCLUDE_FILE.ERR
This file is not built into Hyperview.