Content Feature Schema for Internet Fax
RFC 2531
Document | Type |
RFC - Proposed Standard
(March 1999; No errata)
Obsoleted by RFC 2879
|
|
---|---|---|---|
Authors | Lloyd McIntyre , Graham Klyne | ||
Last updated | 2013-03-02 | ||
Stream | IETF | ||
Formats | plain text html pdf htmlized bibtex | ||
Stream | WG state | (None) | |
Document shepherd | No shepherd assigned | ||
IESG | IESG state | RFC 2531 (Proposed Standard) | |
Consensus Boilerplate | Unknown | ||
Telechat date | |||
Responsible AD | (None) | ||
Send notices to | (None) |
Network Working Group G. Klyne Request for Comments: 2531 5GM/Content Technologies Category: Standards Track L. McIntyre Xerox Corporation March 1999 Content Feature Schema for Internet Fax Status of this Memo This document specifies an Internet standards track protocol for the Internet community, and requests discussion and suggestions for improvements. Please refer to the current edition of the "Internet Official Protocol Standards" (STD 1) for the standardization state and status of this protocol. Distribution of this memo is unlimited. Copyright Notice Copyright (C) The Internet Society (1999). All Rights Reserved. Abstract This document defines a content feature schema that is a profile of the media feature registration mechanisms [1,2,3] for use in performing capability identification between extended Internet fax systems [5]. This document does not describe any specific mechanisms for communicating capability information, but does presume that any such mechanisms will transfer textual values. It specifies a textual format to be used for describing Internet fax capability information. Klyne & McIntyre Standards Track [Page 1] RFC 2531 Content Feature Schema for Internet Fax March 1999 Table of Contents 1. Introduction .............................................3 1.1 Organization of this document............................3 1.2 Terminology and document conventions.....................3 2. Fax feature schema syntax ................................4 3. Internet fax feature tags ................................4 3.1 Image size...............................................5 3.2 Resolution...............................................5 3.3 Media type...............................................6 3.4 Paper Size...............................................6 3.5 Color capability.........................................6 3.6 Color model..............................................8 3.7 Image coding............................................10 4. Examples ................................................12 4.1 Simple mode Internet fax system.........................12 4.2 High-end black-and-white Internet fax system............12 4.3 Grey-scale Internet fax system..........................13 4.4 Full-color Internet fax system..........................13 4.5 Full-color Internet fax system (MRC)....................14 4.6 Sender and receiver feature matching....................15 5. IANA Considerations .....................................17 6. Security Considerations .................................17 6.1 Capability descriptions and mechanisms..................17 6.2 Specific threats........................................18 7. Acknowledgements ........................................18 8. References ..............................................18 9. Authors' Addresses ......................................21 Appendix A: Feature registrations ..........................22 A.1 Image size..............................................22 A.2 Resolution aspect ratio.................................24 A.3 Color levels............................................25 A.4 Color space.............................................27 A.5 CIELAB color depth......................................30 A.6 CIELAB color gamut......................................32 A.7 Image file structure....................................34 A.8 Image data coding.......................................36 A.9 Image coding constraint.................................38 A.10 JBIG stripe size.......................................39 A.11 Image interleave.......................................41 A.12 Color subsampling......................................42 A.13 MRC availability and mode..............................43 A.14 MRC maximum stripe size................................45 Appendix B: TIFF mode descriptions .........................47 Appendix C: Revision history ...............................49 Full Copyright Statement ...................................51 Klyne & McIntyre Standards Track [Page 2] RFC 2531 Content Feature Schema for Internet Fax March 1999 1. Introduction This document defines a content feature schema that is a profile of the media feature registration mechanisms [1,2,3] for use in performing capability identification between extended Internet fax systems [5]. This document does not describe any specific mechanisms for communicating capability information, but does presume that any suchShow full document text