D. Additional Features

This appendix documents protocol elements used by some existing HTTP implementations, but not consistently and correctly across most HTTP/1.0 applications. Implementors should be aware of these features, but cannot rely upon their presence in, or interoperability with, other HTTP/1.0 applications.

• D.1 Additional Request Methods
  • D.1.1 PUT
  • D.1.2 DELETE
  • D.1.3 LINK
  • D.1.4 UNLINK
• D.2 Additional Header Field Definitions
  • D.2.1 Accept
  • D.2.2 Accept-Charset
  • D.2.3 Accept-Encoding
  • D.2.4 Accept-Language
  • D.2.5 Content-Language
  • D.2.6 Link
  • D.2.7 MIME-Version
  • D.2.8 Retry-After
  • D.2.9 Title
  • D.2.10 URI