RFC 2879 (rfc2879) - Page 2 of 58

Content Feature Schema for Internet Fax (V2)

RFC 2879      Content Feature Schema for Internet Fax (V2)   August 2000


      4.2 High-end black-and-white Internet fax system.........14
      4.3 Grey-scale Internet fax system ......................14
      4.4 Full-color Internet fax system (JPEG only) ..........15
      4.5 Full-color Internet fax system (JPEG and JBIG) ......16
      4.6 Full-color Internet fax system (MRC) ................17
      4.7 Sender and receiver feature matching ................19
   5. IANA Considerations .....................................21
   6. Security Considerations .................................21
      6.1 Capability descriptions and mechanisms ..............21
      6.2 Specific threats ....................................21
   7. Acknowledgements ........................................22
   8. References ..............................................22
   9. Authors' Addresses ......................................24
   Appendix A: Feature registrations ..........................25
      A.1 Image size ..........................................25
      A.2 Resolution aspect ratio .............................27
      A.3 Color levels ........................................28
      A.4 Color space  ........................................30
      A.5 CIELAB color illuminant .............................33
      A.6 CIELAB color depth ..................................35
      A.7 CIELAB color gamut ..................................37
      A.8 Image file structure ................................39
      A.9 Image data coding ...................................41
      A.10 Image coding constraint ............................43
      A.11 JBIG stripe size .................................. 44
      A.12 Image interleave ...................................46
      A.13 Color subsampling ..................................47
      A.14 MRC availability and mode ..........................49
      A.15 MRC maximum stripe size ............................50
   Appendix B: TIFF mode descriptions .........................52
   Appendix C: Changes from RFC 2531 ..........................57
   Full Copyright Statement ...................................58

1. Introduction

   This document defines a content media feature schema for Internet
   fax.

   It is a profile of the media feature registration mechanisms [1,2,3]
   for use in performing capability identification between extended
   Internet fax systems [5].  It replaces and updates the feature schema
   defined in RFC 2531.

   The media feature description mechanisms do not describe any specific
   mechanisms for communicating capability information, but do presume
   that any such mechanisms will transfer textual values.  In
   conjunction with this feature schema, they specify a textual format
   to be used for describing Internet Fax capability information.



Klyne & McIntyre            Standards Track