Hello, The RFC6929 states that "tagged" attributes must not be used in the extended-space, in stead "tlv" data types should be used. ( 6.4 Design Guidelines for the New Types ... "tagged" attributes MUST NOT be defined in the Extended-Type space. The "tlv" data type should be used instead to group attributes.) With the extended format, can we indicate in the dictionary that certain attributes belong to different tlv attributes, similar as the tagged functionality before? e.g BEGIN-VENDOR Alcatel-IPD format=Extended-Vendor-Specific-3 ATTRIBUTE Alcatel-IPD-Ext-3-TestAttr-40 40 tlv ATTRIBUTE Alcatel-IPD-Ext-3-TestAttr-50 50 tlv ATTRIBUTE Alcatel-IPD-Ext-3-TestAttr-1 1 integer => I want to indicate that this attribute Alcatel-IPD-Ext-3-TestAttr-1 is aswell part of Alcatel-IPD-Ext-3-TestAttr-40 and Alcatel-IPD-Ext-3-TestAttr-50 without having to duplicate and give another attribute name?? END-VENDOR Alcatel-IPD Similar as with the "tags" we want to be able to indicate that the same attribute can be received in the access-accept but with different tag. How can we achieve this behavior with the tlv extended attribute type without having to define different attribute-names for 40.1 and 50.1? Thanks, kind regards, Katrien.