This implies two things:

1. Any open transaction before full DB backup READ but not committed or rollbacked will be included in the full backup. [It sounds strange to me as ideally backups should not have consider any open transaction]

2. New transaction which is opened after full DB backup READ starts, which is also not committed or rolled back even after full DB backup READ ends, should not be included in the backup. [Which looks ok to me]

Could someone help me with the first point ?