Hi Alan, I hope you are well. Could you please help me understand the example in section 9.1 (page 46) of rfc6929 the extract of which I have copied/pasted below. 9.1<https://tools.ietf.org/html/rfc6929#section-9.1>. Extended Type (example 1) Attribute encapsulating textual data: 241.1 "bob" -> f1 06 01 62 6f 62 (example 2) Attribute encapsulating a TLV with TLV-Type of one (1): 241.2 { 1 23 45 } -> f1 07 02 01 04 23 45 I understand the example-1 fine - but my question is about example-2. 2/ a) in the sentence what does it mean TLV-Type of one (1) ? b) do the values in {} represent type-length-data ? c) f1 07 02 01 04 23 45 does this represent f1=241 (=type), 07=length 02=extended-type, (as in the 2 in 241.2) 01=tlv-type? 04=length of tlv data ? but 23 and 45 ? not sure Thank you in advance for your help. Kind Regards, Robert.