This document specifies extensions (TLVs, sub-TLVs etc.) to IS-IS in support of Segment Routing on IPv6.

The document states that the security considerations are a union of security considerations from a bunch of predecessor document. This seems reasonable to me.

Details:

* The first sentence of the Abstract is missing a word, perhaps "architecture".

* Introduction: typo: "This documents".

* Capabilities: to allow for future extensibility, you should probably add "Implementations receiving this TLV MUST ignore any other bits that may be set in the Flags field".