Please help me understand the changes in dictionary.rfc4679

Hi! I am a bit confused about the dictionary.rfc4679 There are 2 entries (ADSL-Agent-Remote-Id and ADSL-Agent-Circuit-Id), that were changed from string to octets: https://github.com/FreeRADIUS/freeradius-server/commit/0838f3d58a56f63f71515... The RFC states: The format of the value field is one of 2 data types, string or integer [RFC2865] (from: https://tools.ietf.org/html/rfc4679#section-3.2) Can you help me understand why this is octet and not string. Greetings, Daniel Finger