I find that I struggle with the current organisation of Semantics every time I open it. When you're looking for how a given mechanism (e.g., conneg, partial content) works, it's very confusing to have to bounce between parts of s 6, s 8, s 10 and sometimes s 9.

I think the document would read far more easily and logically (especially in the text-only rendering) if we added four new top-level sections, with the content from the listed sections inserted (likely with some rearrangement):

• Partial Content
  • 8.3 Range
  • 6.3.4 Content-Range
  • 6.3.5 Media Type multipart/bytesranges
  • 10.4.1 Accept-Ranges
• Content Negotiation
  • 6.4 Content Negotation
  • 8.4 Negotiation
  • 6.2.1 Content-Type
  • 6.2.2 Content-Encoding
  • 6.2.3 Content-Language
• Conditional Requests
  • 8.2 Preconditions
  • 10.2 Validators
• Authentication
  • 10.3 Authentication Challenges
  • 8.5 Authentication Credentials

I haven't suggested moving the status codes, as that would be more disruptive, and I think there isn't much value in doing so.