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diff --git a/ogg/doc/rfc3533.txt b/ogg/doc/rfc3533.txt deleted file mode 100644 index f2fcd1a..0000000 --- a/ogg/doc/rfc3533.txt +++ /dev/null @@ -1,843 +0,0 @@ - - - - - - -Network Working Group S. Pfeiffer -Request for Comments: 3533 CSIRO -Category: Informational May 2003 - - - The Ogg Encapsulation Format Version 0 - -Status of this Memo - - This memo provides information for the Internet community. It does - not specify an Internet standard of any kind. Distribution of this - memo is unlimited. - -Copyright Notice - - Copyright (C) The Internet Society (2003). All Rights Reserved. - -Abstract - - This document describes the Ogg bitstream format version 0, which is - a general, freely-available encapsulation format for media streams. - It is able to encapsulate any kind and number of video and audio - encoding formats as well as other data streams in a single bitstream. - -Terminology - - The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", - "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this - document are to be interpreted as described in BCP 14, RFC 2119 [2]. - -Table of Contents - - 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 2. Definitions . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 3. Requirements for a generic encapsulation format . . . . . . . 3 - 4. The Ogg bitstream format . . . . . . . . . . . . . . . . . . . 3 - 5. The encapsulation process . . . . . . . . . . . . . . . . . . 6 - 6. The Ogg page format . . . . . . . . . . . . . . . . . . . . . 9 - 7. Security Considerations . . . . . . . . . . . . . . . . . . . 11 - 8. References . . . . . . . . . . . . . . . . . . . . . . . . . . 12 - A. Glossary of terms and abbreviations . . . . . . . . . . . . . 13 - B. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 14 - Author's Address . . . . . . . . . . . . . . . . . . . . . . . 14 - Full Copyright Statement . . . . . . . . . . . . . . . . . . . 15 - - - - - - - -Pfeiffer Informational [Page 1] - -RFC 3533 OGG May 2003 - - -1. Introduction - - The Ogg bitstream format has been developed as a part of a larger - project aimed at creating a set of components for the coding and - decoding of multimedia content (codecs) which are to be freely - available and freely re-implementable, both in software and in - hardware for the computing community at large, including the Internet - community. It is the intention of the Ogg developers represented by - Xiph.Org that it be usable without intellectual property concerns. - - This document describes the Ogg bitstream format and how to use it to - encapsulate one or several media bitstreams created by one or several - encoders. The Ogg transport bitstream is designed to provide - framing, error protection and seeking structure for higher-level - codec streams that consist of raw, unencapsulated data packets, such - as the Vorbis audio codec or the upcoming Tarkin and Theora video - codecs. It is capable of interleaving different binary media and - other time-continuous data streams that are prepared by an encoder as - a sequence of data packets. Ogg provides enough information to - properly separate data back into such encoder created data packets at - the original packet boundaries without relying on decoding to find - packet boundaries. - - Please note that the MIME type application/ogg has been registered - with the IANA [1]. - -2. Definitions - - For describing the Ogg encapsulation process, a set of terms will be - used whose meaning needs to be well understood. Therefore, some of - the most fundamental terms are defined now before we start with the - description of the requirements for a generic media stream - encapsulation format, the process of encapsulation, and the concrete - format of the Ogg bitstream. See the Appendix for a more complete - glossary. - - The result of an Ogg encapsulation is called the "Physical (Ogg) - Bitstream". It encapsulates one or several encoder-created - bitstreams, which are called "Logical Bitstreams". A logical - bitstream, provided to the Ogg encapsulation process, has a - structure, i.e., it is split up into a sequence of so-called - "Packets". The packets are created by the encoder of that logical - bitstream and represent meaningful entities for that encoder only - (e.g., an uncompressed stream may use video frames as packets). They - do not contain boundary information - strung together they appear to - be streams of random bytes with no landmarks. - - - - - -Pfeiffer Informational [Page 2] - -RFC 3533 OGG May 2003 - - - Please note that the term "packet" is not used in this document to - signify entities for transport over a network. - -3. Requirements for a generic encapsulation format - - The design idea behind Ogg was to provide a generic, linear media - transport format to enable both file-based storage and stream-based - transmission of one or several interleaved media streams independent - of the encoding format of the media data. Such an encapsulation - format needs to provide: - - o framing for logical bitstreams. - - o interleaving of different logical bitstreams. - - o detection of corruption. - - o recapture after a parsing error. - - o position landmarks for direct random access of arbitrary positions - in the bitstream. - - o streaming capability (i.e., no seeking is needed to build a 100% - complete bitstream). - - o small overhead (i.e., use no more than approximately 1-2% of - bitstream bandwidth for packet boundary marking, high-level - framing, sync and seeking). - - o simplicity to enable fast parsing. - - o simple concatenation mechanism of several physical bitstreams. - - All of these design considerations have been taken into consideration - for Ogg. Ogg supports framing and interleaving of logical - bitstreams, seeking landmarks, detection of corruption, and stream - resynchronisation after a parsing error with no more than - approximately 1-2% overhead. It is a generic framework to perform - encapsulation of time-continuous bitstreams. It does not know any - specifics about the codec data that it encapsulates and is thus - independent of any media codec. - -4. The Ogg bitstream format - - A physical Ogg bitstream consists of multiple logical bitstreams - interleaved in so-called "Pages". Whole pages are taken in order - from multiple logical bitstreams multiplexed at the page level. The - logical bitstreams are identified by a unique serial number in the - - - -Pfeiffer Informational [Page 3] - -RFC 3533 OGG May 2003 - - - header of each page of the physical bitstream. This unique serial - number is created randomly and does not have any connection to the - content or encoder of the logical bitstream it represents. Pages of - all logical bitstreams are concurrently interleaved, but they need - not be in a regular order - they are only required to be consecutive - within the logical bitstream. Ogg demultiplexing reconstructs the - original logical bitstreams from the physical bitstream by taking the - pages in order from the physical bitstream and redirecting them into - the appropriate logical decoding entity. - - Each Ogg page contains only one type of data as it belongs to one - logical bitstream only. Pages are of variable size and have a page - header containing encapsulation and error recovery information. Each - logical bitstream in a physical Ogg bitstream starts with a special - start page (bos=beginning of stream) and ends with a special page - (eos=end of stream). - - The bos page contains information to uniquely identify the codec type - and MAY contain information to set up the decoding process. The bos - page SHOULD also contain information about the encoded media - for - example, for audio, it should contain the sample rate and number of - channels. By convention, the first bytes of the bos page contain - magic data that uniquely identifies the required codec. It is the - responsibility of anyone fielding a new codec to make sure it is - possible to reliably distinguish his/her codec from all other codecs - in use. There is no fixed way to detect the end of the codec- - identifying marker. The format of the bos page is dependent on the - codec and therefore MUST be given in the encapsulation specification - of that logical bitstream type. Ogg also allows but does not require - secondary header packets after the bos page for logical bitstreams - and these must also precede any data packets in any logical - bitstream. These subsequent header packets are framed into an - integral number of pages, which will not contain any data packets. - So, a physical bitstream begins with the bos pages of all logical - bitstreams containing one initial header packet per page, followed by - the subsidiary header packets of all streams, followed by pages - containing data packets. - - The encapsulation specification for one or more logical bitstreams is - called a "media mapping". An example for a media mapping is "Ogg - Vorbis", which uses the Ogg framework to encapsulate Vorbis-encoded - audio data for stream-based storage (such as files) and transport - (such as TCP streams or pipes). Ogg Vorbis provides the name and - revision of the Vorbis codec, the audio rate and the audio quality on - the Ogg Vorbis bos page. It also uses two additional header pages - per logical bitstream. The Ogg Vorbis bos page starts with the byte - 0x01, followed by "vorbis" (a total of 7 bytes of identifier). - - - - -Pfeiffer Informational [Page 4] - -RFC 3533 OGG May 2003 - - - Ogg knows two types of multiplexing: concurrent multiplexing (so- - called "Grouping") and sequential multiplexing (so-called - "Chaining"). Grouping defines how to interleave several logical - bitstreams page-wise in the same physical bitstream. Grouping is for - example needed for interleaving a video stream with several - synchronised audio tracks using different codecs in different logical - bitstreams. Chaining on the other hand, is defined to provide a - simple mechanism to concatenate physical Ogg bitstreams, as is often - needed for streaming applications. - - In grouping, all bos pages of all logical bitstreams MUST appear - together at the beginning of the Ogg bitstream. The media mapping - specifies the order of the initial pages. For example, the grouping - of a specific Ogg video and Ogg audio bitstream may specify that the - physical bitstream MUST begin with the bos page of the logical video - bitstream, followed by the bos page of the audio bitstream. Unlike - bos pages, eos pages for the logical bitstreams need not all occur - contiguously. Eos pages may be 'nil' pages, that is, pages - containing no content but simply a page header with position - information and the eos flag set in the page header. Each grouped - logical bitstream MUST have a unique serial number within the scope - of the physical bitstream. - - In chaining, complete logical bitstreams are concatenated. The - bitstreams do not overlap, i.e., the eos page of a given logical - bitstream is immediately followed by the bos page of the next. Each - chained logical bitstream MUST have a unique serial number within the - scope of the physical bitstream. - - It is possible to consecutively chain groups of concurrently - multiplexed bitstreams. The groups, when unchained, MUST stand on - their own as a valid concurrently multiplexed bitstream. The - following diagram shows a schematic example of such a physical - bitstream that obeys all the rules of both grouped and chained - multiplexed bitstreams. - - physical bitstream with pages of - different logical bitstreams grouped and chained - ------------------------------------------------------------- - |*A*|*B*|*C*|A|A|C|B|A|B|#A#|C|...|B|C|#B#|#C#|*D*|D|...|#D#| - ------------------------------------------------------------- - bos bos bos eos eos eos bos eos - - In this example, there are two chained physical bitstreams, the first - of which is a grouped stream of three logical bitstreams A, B, and C. - The second physical bitstream is chained after the end of the grouped - bitstream, which ends after the last eos page of all its grouped - logical bitstreams. As can be seen, grouped bitstreams begin - - - -Pfeiffer Informational [Page 5] - -RFC 3533 OGG May 2003 - - - together - all of the bos pages MUST appear before any data pages. - It can also be seen that pages of concurrently multiplexed bitstreams - need not conform to a regular order. And it can be seen that a - grouped bitstream can end long before the other bitstreams in the - group end. - - Ogg does not know any specifics about the codec data except that each - logical bitstream belongs to a different codec, the data from the - codec comes in order and has position markers (so-called "Granule - positions"). Ogg does not have a concept of 'time': it only knows - about sequentially increasing, unitless position markers. An - application can only get temporal information through higher layers - which have access to the codec APIs to assign and convert granule - positions or time. - - A specific definition of a media mapping using Ogg may put further - constraints on its specific use of the Ogg bitstream format. For - example, a specific media mapping may require that all the eos pages - for all grouped bitstreams need to appear in direct sequence. An - example for a media mapping is the specification of "Ogg Vorbis". - Another example is the upcoming "Ogg Theora" specification which - encapsulates Theora-encoded video data and usually comes multiplexed - with a Vorbis stream for an Ogg containing synchronised audio and - video. As Ogg does not specify temporal relationships between the - encapsulated concurrently multiplexed bitstreams, the temporal - synchronisation between the audio and video stream will be specified - in this media mapping. To enable streaming, pages from various - logical bitstreams will typically be interleaved in chronological - order. - -5. The encapsulation process - - The process of multiplexing different logical bitstreams happens at - the level of pages as described above. The bitstreams provided by - encoders are however handed over to Ogg as so-called "Packets" with - packet boundaries dependent on the encoding format. The process of - encapsulating packets into pages will be described now. - - From Ogg's perspective, packets can be of any arbitrary size. A - specific media mapping will define how to group or break up packets - from a specific media encoder. As Ogg pages have a maximum size of - about 64 kBytes, sometimes a packet has to be distributed over - several pages. To simplify that process, Ogg divides each packet - into 255 byte long chunks plus a final shorter chunk. These chunks - are called "Ogg Segments". They are only a logical construct and do - not have a header for themselves. - - - - - -Pfeiffer Informational [Page 6] - -RFC 3533 OGG May 2003 - - - A group of contiguous segments is wrapped into a variable length page - preceded by a header. A segment table in the page header tells about - the "Lacing values" (sizes) of the segments included in the page. A - flag in the page header tells whether a page contains a packet - continued from a previous page. Note that a lacing value of 255 - implies that a second lacing value follows in the packet, and a value - of less than 255 marks the end of the packet after that many - additional bytes. A packet of 255 bytes (or a multiple of 255 bytes) - is terminated by a lacing value of 0. Note also that a 'nil' (zero - length) packet is not an error; it consists of nothing more than a - lacing value of zero in the header. - - The encoding is optimized for speed and the expected case of the - majority of packets being between 50 and 200 bytes large. This is a - design justification rather than a recommendation. This encoding - both avoids imposing a maximum packet size as well as imposing - minimum overhead on small packets. In contrast, e.g., simply using - two bytes at the head of every packet and having a max packet size of - 32 kBytes would always penalize small packets (< 255 bytes, the - typical case) with twice the segmentation overhead. Using the lacing - values as suggested, small packets see the minimum possible byte- - aligned overhead (1 byte) and large packets (>512 bytes) see a fairly - constant ~0.5% overhead on encoding space. - - - - - - - - - - - - - - - - - - - - - - - - - - - - -Pfeiffer Informational [Page 7] - -RFC 3533 OGG May 2003 - - - The following diagram shows a schematic example of a media mapping - using Ogg and grouped logical bitstreams: - - logical bitstream with packet boundaries - ----------------------------------------------------------------- - > | packet_1 | packet_2 | packet_3 | < - ----------------------------------------------------------------- - - |segmentation (logically only) - v - - packet_1 (5 segments) packet_2 (4 segs) p_3 (2 segs) - ------------------------------ -------------------- ------------ - .. |seg_1|seg_2|seg_3|seg_4|s_5 | |seg_1|seg_2|seg_3|| |seg_1|s_2 | .. - ------------------------------ -------------------- ------------ - - | page encapsulation - v - - page_1 (packet_1 data) page_2 (pket_1 data) page_3 (packet_2 data) ------------------------- ---------------- ------------------------ -|H|------------------- | |H|----------- | |H|------------------- | -|D||seg_1|seg_2|seg_3| | |D|seg_4|s_5 | | |D||seg_1|seg_2|seg_3| | ... -|R|------------------- | |R|----------- | |R|------------------- | ------------------------- ---------------- ------------------------ - - | -pages of | -other --------| | -logical ------- -bitstreams | MUX | - ------- - | - v - - page_1 page_2 page_3 - ------ ------ ------- ----- ------- - ... || | || | || | || | || | ... - ------ ------ ------- ----- ------- - physical Ogg bitstream - - In this example we take a snapshot of the encapsulation process of - one logical bitstream. We can see part of that bitstream's - subdivision into packets as provided by the codec. The Ogg - encapsulation process chops up the packets into segments. The - packets in this example are rather large such that packet_1 is split - into 5 segments - 4 segments with 255 bytes and a final smaller one. - Packet_2 is split into 4 segments - 3 segments with 255 bytes and a - - - -Pfeiffer Informational [Page 8] - -RFC 3533 OGG May 2003 - - - final very small one - and packet_3 is split into two segments. The - encapsulation process then creates pages, which are quite small in - this example. Page_1 consists of the first three segments of - packet_1, page_2 contains the remaining 2 segments from packet_1, and - page_3 contains the first three pages of packet_2. Finally, this - logical bitstream is multiplexed into a physical Ogg bitstream with - pages of other logical bitstreams. - -6. The Ogg page format - - A physical Ogg bitstream consists of a sequence of concatenated - pages. Pages are of variable size, usually 4-8 kB, maximum 65307 - bytes. A page header contains all the information needed to - demultiplex the logical bitstreams out of the physical bitstream and - to perform basic error recovery and landmarks for seeking. Each page - is a self-contained entity such that the page decode mechanism can - recognize, verify, and handle single pages at a time without - requiring the overall bitstream. - - The Ogg page header has the following format: - - 0 1 2 3 - 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1| Byte -+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ -| capture_pattern: Magic number for page start "OggS" | 0-3 -+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ -| version | header_type | granule_position | 4-7 -+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ -| | 8-11 -+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ -| | bitstream_serial_number | 12-15 -+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ -| | page_sequence_number | 16-19 -+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ -| | CRC_checksum | 20-23 -+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ -| |page_segments | segment_table | 24-27 -+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ -| ... | 28- -+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - - The LSb (least significant bit) comes first in the Bytes. Fields - with more than one byte length are encoded LSB (least significant - byte) first. - - - - - - - -Pfeiffer Informational [Page 9] - -RFC 3533 OGG May 2003 - - - The fields in the page header have the following meaning: - - 1. capture_pattern: a 4 Byte field that signifies the beginning of a - page. It contains the magic numbers: - - 0x4f 'O' - - 0x67 'g' - - 0x67 'g' - - 0x53 'S' - - It helps a decoder to find the page boundaries and regain - synchronisation after parsing a corrupted stream. Once the - capture pattern is found, the decoder verifies page sync and - integrity by computing and comparing the checksum. - - 2. stream_structure_version: 1 Byte signifying the version number of - the Ogg file format used in this stream (this document specifies - version 0). - - 3. header_type_flag: the bits in this 1 Byte field identify the - specific type of this page. - - * bit 0x01 - - set: page contains data of a packet continued from the previous - page - - unset: page contains a fresh packet - - * bit 0x02 - - set: this is the first page of a logical bitstream (bos) - - unset: this page is not a first page - - * bit 0x04 - - set: this is the last page of a logical bitstream (eos) - - unset: this page is not a last page - - 4. granule_position: an 8 Byte field containing position information. - For example, for an audio stream, it MAY contain the total number - of PCM samples encoded after including all frames finished on this - page. For a video stream it MAY contain the total number of video - - - -Pfeiffer Informational [Page 10] - -RFC 3533 OGG May 2003 - - - frames encoded after this page. This is a hint for the decoder - and gives it some timing and position information. Its meaning is - dependent on the codec for that logical bitstream and specified in - a specific media mapping. A special value of -1 (in two's - complement) indicates that no packets finish on this page. - - 5. bitstream_serial_number: a 4 Byte field containing the unique - serial number by which the logical bitstream is identified. - - 6. page_sequence_number: a 4 Byte field containing the sequence - number of the page so the decoder can identify page loss. This - sequence number is increasing on each logical bitstream - separately. - - 7. CRC_checksum: a 4 Byte field containing a 32 bit CRC checksum of - the page (including header with zero CRC field and page content). - The generator polynomial is 0x04c11db7. - - 8. number_page_segments: 1 Byte giving the number of segment entries - encoded in the segment table. - - 9. segment_table: number_page_segments Bytes containing the lacing - values of all segments in this page. Each Byte contains one - lacing value. - - The total header size in bytes is given by: - header_size = number_page_segments + 27 [Byte] - - The total page size in Bytes is given by: - page_size = header_size + sum(lacing_values: 1..number_page_segments) - [Byte] - -7. Security Considerations - - The Ogg encapsulation format is a container format and only - encapsulates content (such as Vorbis-encoded audio). It does not - provide for any generic encryption or signing of itself or its - contained content bitstreams. However, it encapsulates any kind of - content bitstream as long as there is a codec for it, and is thus - able to contain encrypted and signed content data. It is also - possible to add an external security mechanism that encrypts or signs - an Ogg physical bitstream and thus provides content confidentiality - and authenticity. - - As Ogg encapsulates binary data, it is possible to include executable - content in an Ogg bitstream. This can be an issue with applications - that are implemented using the Ogg format, especially when Ogg is - used for streaming or file transfer in a networking scenario. As - - - -Pfeiffer Informational [Page 11] - -RFC 3533 OGG May 2003 - - - such, Ogg does not pose a threat there. However, an application - decoding Ogg and its encapsulated content bitstreams has to ensure - correct handling of manipulated bitstreams, of buffer overflows and - the like. - -8. References - - [1] Walleij, L., "The application/ogg Media Type", RFC 3534, May - 2003. - - [2] Bradner, S., "Key words for use in RFCs to Indicate Requirement - Levels", BCP 14, RFC 2119, March 1997. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -Pfeiffer Informational [Page 12] - -RFC 3533 OGG May 2003 - - -Appendix A. Glossary of terms and abbreviations - - bos page: The initial page (beginning of stream) of a logical - bitstream which contains information to identify the codec type - and other decoding-relevant information. - - chaining (or sequential multiplexing): Concatenation of two or more - complete physical Ogg bitstreams. - - eos page: The final page (end of stream) of a logical bitstream. - - granule position: An increasing position number for a specific - logical bitstream stored in the page header. Its meaning is - dependent on the codec for that logical bitstream and specified in - a specific media mapping. - - grouping (or concurrent multiplexing): Interleaving of pages of - several logical bitstreams into one complete physical Ogg - bitstream under the restriction that all bos pages of all grouped - logical bitstreams MUST appear before any data pages. - - lacing value: An entry in the segment table of a page header - representing the size of the related segment. - - logical bitstream: A sequence of bits being the result of an encoded - media stream. - - media mapping: A specific use of the Ogg encapsulation format - together with a specific (set of) codec(s). - - (Ogg) packet: A subpart of a logical bitstream that is created by the - encoder for that bitstream and represents a meaningful entity for - the encoder, but only a sequence of bits to the Ogg encapsulation. - - (Ogg) page: A physical bitstream consists of a sequence of Ogg pages - containing data of one logical bitstream only. It usually - contains a group of contiguous segments of one packet only, but - sometimes packets are too large and need to be split over several - pages. - - physical (Ogg) bitstream: The sequence of bits resulting from an Ogg - encapsulation of one or several logical bitstreams. It consists - of a sequence of pages from the logical bitstreams with the - restriction that the pages of one logical bitstream MUST come in - their correct temporal order. - - - - - - -Pfeiffer Informational [Page 13] - -RFC 3533 OGG May 2003 - - - (Ogg) segment: The Ogg encapsulation process splits each packet into - chunks of 255 bytes plus a last fractional chunk of less than 255 - bytes. These chunks are called segments. - -Appendix B. Acknowledgements - - The author gratefully acknowledges the work that Christopher - Montgomery and the Xiph.Org foundation have done in defining the Ogg - multimedia project and as part of it the open file format described - in this document. The author hopes that providing this document to - the Internet community will help in promoting the Ogg multimedia - project at http://www.xiph.org/. Many thanks also for the many - technical and typo corrections that C. Montgomery and the Ogg - community provided as feedback to this RFC. - -Author's Address - - Silvia Pfeiffer - CSIRO, Australia - Locked Bag 17 - North Ryde, NSW 2113 - Australia - - Phone: +61 2 9325 3141 - EMail: Silvia.Pfeiffer@csiro.au - URI: http://www.cmis.csiro.au/Silvia.Pfeiffer/ - - - - - - - - - - - - - - - - - - - - - - - - - -Pfeiffer Informational [Page 14] - -RFC 3533 OGG May 2003 - - -Full Copyright Statement - - Copyright (C) The Internet Society (2003). All Rights Reserved. - - This document and translations of it may be copied and furnished to - others, and derivative works that comment on or otherwise explain it - or assist in its implementation may be prepared, copied, published - and distributed, in whole or in part, without restriction of any - kind, provided that the above copyright notice and this paragraph are - included on all such copies and derivative works. However, this - document itself may not be modified in any way, such as by removing - the copyright notice or references to the Internet Society or other - Internet organizations, except as needed for the purpose of - developing Internet standards in which case the procedures for - copyrights defined in the Internet Standards process must be - followed, or as required to translate it into languages other than - English. - - The limited permissions granted above are perpetual and will not be - revoked by the Internet Society or its successors or assigns. - - This document and the information contained herein is provided on an - "AS IS" basis and THE INTERNET SOCIETY AND THE INTERNET ENGINEERING - TASK FORCE DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING - BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION - HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF - MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. - -Acknowledgement - - Funding for the RFC Editor function is currently provided by the - Internet Society. - - - - - - - - - - - - - - - - - - - -Pfeiffer Informational [Page 15] - |