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[/Author (B. Lilly) /Title (Indicating and Negotiating Text Script) /DOCINFO pdfmark
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211.492 156.944 Q(Status of this Memo)56.692 180.944 Q
(By submitting this Internet\255Draft, the author represents that any)
78.292 204.944 Q
(applicable patent or other IPR claims of which he is aware have been)
78.292 216.944 Q
(or will be disclosed, and any of which he becomes aware will be)78.292
228.944 Q(disclosed, in accordance with Section 6 of BCP 79.)78.292
240.944 Q
(Internet\255Drafts are working documents of the Internet Engineering)
78.292 264.944 Q
(Task Force \(IETF\), its areas, and its working groups.)78.292 276.944
Q(Note that)14.4 E
(other groups may also distribute working documents as)78.292 288.944 Q
(Internet\255Drafts.)78.292 300.944 Q(Internet\255Drafts are draft docu\
ments valid for a maximum of six months)78.292 324.944 Q
(and may be updated, replaced, or obsoleted by other documents at any)
78.292 336.944 Q 7.2(time. It)78.292 348.944 R
(is inappropriate to use Internet\255Drafts as reference)7.2 E
(material or to cite them other than as "work in progress.")78.292
360.944 Q(The list of current Internet\255Drafts can be accessed at)
78.292 384.944 Q(http://www.ietf.org/ietf/1id\255abstracts.txt.)78.292
396.944 Q
(The list of Internet\255Draft Shadow Directories can be accessed at)
78.292 420.944 Q(http://www.ietf.org/shadow.html.)78.292 432.944 Q
(Copyright Notice)56.692 456.944 Q 7.2(Copyright \251 The)78.292 480.944
R(Internet Society \(2005\).)7.2 E(Abstract)56.692 504.944 Q
(Some written text in some languages can be represented in multiple)
78.292 528.944 Q(scripts, or writing forms.)78.292 540.944 Q
(This memo proposes mechanisms for)14.4 E
(identification and negotiation of script for written text.)78.292
552.944 Q 122.4(Lilly Expires)56.692 768.944 R(September 15, 2005)7.2 E
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/F0 12/Courier@0 SF 14.4(Internet\255Draft Indicating)20.182 84.944 R
(and Negotiating Text Script)7.2 E(March 2005)50.4 E(Table of Contents)
20.182 108.944 Q
(1. Introduction...................................................)
41.782 132.944 Q(3)14.4 E
(1.1. Script, Language, Charset, and Content....................)63.382
144.944 Q(3)14.4 E
(1.1.1. Script is Distinct from Language.....................)84.982
156.944 Q(3)14.4 E
(1.1.2. Script is Related to Charset.........................)84.982
168.944 Q(3)14.4 E
(1.1.3. Documents in a Single Language May Have Multiple)84.982 180.944
Q 7.2(Scripts.............................................. 3)135.382
192.944 R(1.1.4. Documents in Multiple Languages May Use a Single)84.982
204.944 Q 7.2(Script............................................... 3)
135.382 216.944 R
(2. Requirement Levels.............................................)
41.782 228.944 Q(3)14.4 E
(3. ABNF References................................................)
41.782 240.944 Q(3)14.4 E
(4. Header Fields..................................................)
41.782 252.944 Q(4)14.4 E
(4.1. Indicating Script; the Content-Script Header Field........)63.382
264.944 Q(4)14.4 E
(4.1.1. Semantics............................................)84.982
276.944 Q(4)14.4 E
(4.1.2. ABNF.................................................)84.982
288.944 Q(4)14.4 E
(4.1.3. Usage................................................)84.982
300.944 Q(4)14.4 E
(4.1.4. Header Field Registration Template...................)84.982
312.944 Q(5)14.4 E
(4.2. Script Negotiation; the Accept-Script Header Field........)63.382
324.944 Q(6)14.4 E
(4.2.1. Semantics............................................)84.982
336.944 Q(6)14.4 E
(4.2.2. ABNF.................................................)84.982
348.944 Q(6)14.4 E
(4.2.3. Semantic Details.....................................)84.982
360.944 Q(6)14.4 E
(4.2.4. Usage................................................)84.982
372.944 Q(6)14.4 E
(4.2.5. Header Field Registration Templates..................)84.982
384.944 Q(7)14.4 E
(5. Media Feature Tag..............................................)
41.782 396.944 Q(8)14.4 E
(5.1. Media Feature Tag Registration Template...................)63.382
408.944 Q(9)14.4 E
(6. Acknowledgments................................................ 10)
41.782 420.944 Q
(7. Security Considerations........................................ 10)
41.782 432.944 Q
(8. Internationalization Considerations............................ 10)
41.782 444.944 Q
(9. IANA Considerations............................................ 11)
41.782 456.944 Q
(Appendix A. Examples.............................................. 11)
41.782 468.944 Q
(A.1. Script Indication......................................... 11)
63.382 480.944 Q
(A.1.1. Simple Example....................................... 11)84.982
492.944 Q
(A.1.2. Multiple Alternatives................................ 11)84.982
504.944 Q
(A.2. Script Negotiation........................................ 11)
63.382 516.944 Q
(Appendix B. Change History........................................ 11)
41.782 528.944 Q
(Normative References.............................................. 12)
41.782 540.944 Q
(Informative References............................................ 12)
41.782 552.944 Q
(Author's Address.................................................. 13)
41.782 564.944 Q 122.4(Lilly Expires)20.182 768.944 R
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(Some written text in some languages can be represented in multiple)
78.292 132.944 Q(scripts, or writing forms.)78.292 144.944 Q
(This memo proposes mechanisms for)14.4 E
(identification and negotiation of script.)78.292 156.944 Q 56.692
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(Language is a characteristic of many forms of human communication.)
78.292 228.944 Q
(For example, it applies to oral communication and to writing.)78.292
240.944 Q
(Script, however, applies only to a subset of communication forms.)
78.292 252.944 Q
(Therefore, for purposes such as content negotiation, it is desirable)
78.292 264.944 Q(to indicate script separately from language.)78.292
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EEND/F0 12/Courier@0 SF(1.1.2. Script is Related to Charset)56.692
300.944 Q(Some charsets [I1.RFC2978] apply only to a single script.)
78.292 324.944 Q(For)14.4 E
(example, ANSI X3.4 applies only to Latin script, and KOI8 applies)
78.292 336.944 Q(only to Cyrillic script.)78.292 348.944 Q
(In other cases, such as ISO 10646, script)14.4 E
(can be inferred from the range of character codes used, provided one)
78.292 360.944 Q
(has access to the content and is willing to analyze it.)78.292 372.944
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(multiple scripts may be associated with a single language in a single)
78.292 432.944 Q(document or piece of text.)78.292 444.944 Q
(It is not uncommon for text in Japanese,)14.4 E
(for example, to contain a mix of Katakana and Hiragana, and some text)
78.292 456.944 Q
(also contains Latin script for some words of foreign origin.)78.292
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(document written in a single script might contain multiple languages.)
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(The key words "MUST", "MUST NOT", "SHOULD", "SHOULD NOT",)78.292
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("RECOMMENDED", and "MAY" in this document are to be interpreted as)
78.292 588.944 Q(described in [N1.BCP14].)78.292 600.944 Q 56.692
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(ABNF in this document uses grammar productions defined in)78.292
648.944 Q([N2.RFC2234] and [N3.RFC2822].)78.292 660.944 Q 122.4
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(The Content\255Script field indicates the script or scripts used in a)
41.782 180.944 Q
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(between the field name tag \(a case\255insensitive protocol element)
41.782 348.944 Q
([N3.RFC2822], [I3.RFC1958]\) and the colon separating the field name)
41.782 360.944 Q(from the field body.)41.782 372.944 Q
(Generators MUST NOT insert linear whitespace or)14.4 E
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(where script is not unique to the language in use.)41.782 480.944 Q
(It MAY be omitted for short texts where script may be determined from)
41.782 504.944 Q
(the charset and character codes used, or where only a single script)
41.782 516.944 Q(is used for the language\(s\) applicable to the text.)
41.782 528.944 Q
(It MAY be used for image data representing text, such as facsimile)
41.782 552.944 Q(image data.)41.782 564.944 Q
(It MUST NOT be used where no script is applicable, such as in audio)
41.782 588.944 Q
(data of spoken language, or image or video media where no script is)
41.782 600.944 Q(applicable to the content.)41.782 612.944 Q
(It SHOULD NOT be used where visible text is merely incidental to the)
41.782 636.944 Q
(content, as may be the case with some content using image, video, or)
41.782 648.944 Q(model media types.)41.782 660.944 Q(4.1.3.2. Where)
20.182 696.944 Q
(The Content-Script field MAY be used in the message header)41.782
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([N3.RFC2822] of a MIME message [I5.RFC2045], in a MIME\255part header)
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([I6.RFC2046], or in the header of a protocol which uses MIME header)
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(The field MAY be used in the MIME\255part header of a composite media)
78.292 144.944 Q
(type [I6.RFC2046], if and only if it is equally applicable to each)
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(When used with composite media)14.4 E
(types, each component piece of content acquires the semantics)78.292
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(associated with the Content\255Script field\(s\) in the enclosing)
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(composite media type MIME\255part headers, plus those of any)78.292
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(Content\255Script fields in the MIME message header, plus those of any)
78.292 216.944 Q
(Content\255Script fields in that individual component media type's)
78.292 228.944 Q(MIME\255part header.)78.292 240.944 Q
(There is no mechanism to remove the semantics)14.4 E
(associated with an enclosing composite media type, therefore a script)
78.292 252.944 Q
(code MUST NOT be specified in a Content\255Script field in a composite)
78.292 264.944 Q
(media type MIME\255part header if the concept of script is not)78.292
276.944 Q
(applicable to some enclosed media type or if some enclosed media type)
78.292 288.944 Q(does not use that script.)78.292 300.944 Q
(Its use is RECOMMENDED with media type message/external-body as it)
78.292 324.944 Q
(may help to reduce wasted resources that might otherwise be expended)
78.292 336.944 Q(on retrieval of unintelligible content.)78.292 348.944
Q(4.1.3.3. Who)56.692 372.944 Q
(The Content-Script field MAY be set by a message or content author or)
78.292 396.944 Q 7.2(au)78.292 408.944 S
(ser agent acting on the author's behalf.)-7.2 E(It MUST NOT be inserte\
d, modified \(except for non-protocol elements\),)78.292 432.944 Q
(or deleted by submission, transport, or delivery agents)78.292 444.944
Q([I9.Crocker05].)78.292 456.944 Q
(It SHOULD, when present, be used by recipient user agents to assist)
78.292 480.944 Q
(in presentation of human\255readable content \(presentation includes)
78.292 492.944 Q
(display as well as text\255to\255speech conversion and similar)78.292
504.944 Q(technologies\).)78.292 516.944 Q(4.1.3.4. How Many)56.692
540.944 Q
(It is RECOMMENDED that a single Content\255Script field be used in the)
78.292 564.944 Q(header associated with a piece of content.)78.292
576.944 Q
(Multiple Content\255Script fields MAY be used, and if present in a)
78.292 600.944 Q
(single piece of content MUST be interpreted identically to a single)
78.292 612.944 Q
(field listing all scripts listed in all Content\255Script fields)78.292
624.944 Q(applicable to the content.)78.292 636.944 Q 56.692 660.944
EBEGIN
[/Title (4.1.4. Header Field Registration Template) /Dest (S4.1.4.) /OUT pdfmark
EEND 56.692 660.944 EBEGIN
[/Dest (S4.1.4.) /Page 5 /View [ /FitH 168 ] /DEST pdfmark
EEND/F0 12/Courier@0 SF(4.1.4. Header Field Registration Template)56.692
660.944 Q([I10.BCP90] requires a registration template.)78.292 684.944 Q
(The template is)14.4 E(provided in this section.)78.292 696.944 Q
(Header field name: Content\255Script)78.292 720.944 Q
(Applicable protocol: mime)78.292 744.944 Q 122.4(Lilly Expires)56.692
768.944 R(September 15, 2005)7.2 E([Page 5])108 E 0 Cg EP
%%Page: 6 6
%%BeginPageSetup
BP
%%EndPageSetup
/F0 12/Courier@0 SF 14.4(Internet\255Draft Indicating)20.182 84.944 R
(and Negotiating Text Script)7.2 E(March 2005)50.4 E
(Status: standards track)41.782 108.944 Q
(Author/Change controller: IESG)41.782 132.944 Q
(Specification document\(s\): This document \(when approved and an RFC)
41.782 156.944 Q(number assigned\))77.782 168.944 Q
(Related information: none)41.782 192.944 Q 20.182 216.944 EBEGIN
[/Title (4.2. Script Negotiation; the Accept-Script Header Field) /Dest (S4.2.1.) /OUT pdfmark
EEND 20.182 216.944 EBEGIN
[/Dest (S4.2.1.) /Page 6 /View [ /FitH 612 ] /DEST pdfmark
EEND/F0 12/Courier@0 SF
(4.2. Script Negotiation; the Accept-Script Header Field)20.182 216.944
Q 20.182 240.944 EBEGIN
[/Title (4.2.1. Semantics) /Dest (S4.2.1.) /OUT pdfmark
EEND 20.182 240.944 EBEGIN
[/Dest (S4.2.1.) /Page 6 /View [ /FitH 588 ] /DEST pdfmark
EEND/F0 12/Courier@0 SF(4.2.1. Semantics)20.182 240.944 Q
(The Accept\255Script field indicates a set of preferences related to)
41.782 264.944 Q 7.2(script. See)41.782 276.944 R
(below for details of interpretations of preference)7.2 E(values.)41.782
288.944 Q 20.182 312.944 EBEGIN
[/Title (4.2.2. ABNF) /Dest (S4.2.2.) /OUT pdfmark
EEND 20.182 312.944 EBEGIN
[/Dest (S4.2.2.) /Page 6 /View [ /FitH 516 ] /DEST pdfmark
EEND/F0 12/Courier@0 SF(4.2.2. ABNF)20.182 312.944 Q(Note that there is\
 no provision for linear whitespace or line\255folding)41.782 336.944 Q
(between the field name tag \(a case\255insensitive protocol element)
41.782 348.944 Q
([N3.RFC2822], [I3.RFC1958]\) and the colon separating the field name)
41.782 360.944 Q(from the field body.)41.782 372.944 Q
(Generators MUST NOT insert linear whitespace or)14.4 E
(line folding between the field name and the colon.)41.782 384.944 Q
20.182 408.944 EBEGIN
[/Title (4.2.3. Semantic Details) /Dest (S4.2.3.) /OUT pdfmark
EEND 20.182 408.944 EBEGIN
[/Dest (S4.2.3.) /Page 6 /View [ /FitH 420 ] /DEST pdfmark
EEND/F0 12/Courier@0 SF(4.2.3. Semantic Details)20.182 408.944 Q
(Each script may have an associated preference value, indicated as a)
41.782 432.944 Q
(decimal floating\255point number with at most three decimal places.)
41.782 444.944 Q(An)14.4 E
(asterisk matches any script not explicitly listed.)41.782 456.944 Q
(The default)14.4 E
(preference value associated with a script or asterisk is 1.)41.782
468.944 Q(Scripts)14.4 E
(with larger preference values are preferable to scripts with lower)
41.782 480.944 Q(preference values.)41.782 492.944 Q 7.2(As)14.4 G
(cript SHOULD NOT be named more than once in an)-7.2 E
(Accept\255Script field; if it is, however, the preference value)41.782
504.944 Q
(associated with the script is the last one presented with that script)
41.782 516.944 Q(in left\255to\255right order in the field body.)41.782
528.944 Q(If an Accept\255Script field)14.4 E
(is presented, any scripts not explicitly named have an implicit)41.782
540.944 Q
(preference value associated with an asterisk if one is presented in)
41.782 552.944 Q
(the field; if there is no asterisk, the preference value for unnamed)
41.782 564.944 Q(scripts is implicitly zero.)41.782 576.944 Q
(If no Accept\255Script field is presented,)14.4 E
(all scripts are to be presumed to be equally preferred.)41.782 588.944
Q 20.182 612.944 EBEGIN
[/Title (4.2.4. Usage) /Dest (S4.2.4.1.) /OUT pdfmark
EEND 20.182 612.944 EBEGIN
[/Dest (S4.2.4.1.) /Page 6 /View [ /FitH 216 ] /DEST pdfmark
EEND/F0 12/Courier@0 SF(4.2.4. Usage)20.182 612.944 Q(4.2.4.1. When)
20.182 636.944 Q
(An Accept\255Script field MAY be used to indicate script preferences)
41.782 660.944 Q
(where a suitable negotiation method, such as [I11.RFC2295] is)41.782
672.944 Q(available, and the requester has a preference, and script is)
41.782 684.944 Q
(potentially relevant to one or more media types under consideration.)
41.782 696.944 Q
(It SHOULD NOT be used if any of those conditions is not met.)41.782
708.944 Q 122.4(Lilly Expires)20.182 768.944 R(September 15, 2005)7.2 E
([Page 6])108 E 0 Cg EP
%%Page: 7 7
%%BeginPageSetup
BP
%%EndPageSetup
/F0 12/Courier@0 SF 14.4(Internet\255Draft Indicating)56.692 84.944 R
(and Negotiating Text Script)7.2 E(March 2005)50.4 E(4.2.4.2. Where)
56.692 108.944 Q
(Usage of an Accept\255Script field is dictated by the negotiation)
78.292 132.944 Q(protocol and is outside of the scope of this document.)
78.292 144.944 Q(4.2.4.3. Who)56.692 168.944 Q(The Accept\255Script fie\
ld MAY be set by a message or content requester)78.292 192.944 Q
(or a user agent acting on the requester's behalf.)78.292 204.944 Q(It \
MUST NOT be inserted, modified \(except for non-protocol elements\),)
78.292 228.944 Q(or deleted by transport protocols.)78.292 240.944 Q
(It SHOULD, when present, be used by content\255serving protocols to)
78.292 264.944 Q
(supply preferred content to requesters when content in multiple)78.292
276.944 Q(scripts otherwise meeting requests is available.)78.292
288.944 Q(This memo does not)14.4 E(address how content\255serving prot\
ocols should balance preferences for)78.292 300.944 Q
(multiple characteristics of requested content; that is left to)78.292
312.944 Q
(content\255serving protocol specifications and/or implementations.)
78.292 324.944 Q(4.2.4.4. How Many)56.692 348.944 Q
(At most one Accept\255Script field may be presented.)78.292 372.944 Q
56.692 396.944 EBEGIN
[/Title (4.2.5. Header Field Registration Templates) /Dest (S4.2.5.) /OUT pdfmark
EEND 56.692 396.944 EBEGIN
[/Dest (S4.2.5.) /Page 7 /View [ /FitH 432 ] /DEST pdfmark
EEND/F0 12/Courier@0 SF(4.2.5. Header Field Registration Templates)
56.692 396.944 Q
([I10.BCP90] requires separate templates for different "protocols".)
78.292 420.944 Q(Since the Accept\255Script field is not a MIME field, \
and may be used by)78.292 432.944 Q 7.2(an)78.292 444.944 S
(umber of protocols which support content negotiation, templates)-7.2 E
(are provided in this section for such protocols using header fields)
78.292 456.944 Q(known at the time of writing.)78.292 468.944 Q
(4.2.5.1. HTTP Header Field Registration Templates)56.692 492.944 Q
(There are two Hyper text transfer protocols \(HTTP\): [I7.RFC1945],)
78.292 516.944 Q 7.2([I8.RFC2616]. The)78.292 528.944 R
(registration templates for those protocols are)7.2 E
(provided in this section.)78.292 540.944 Q
(4.2.5.1.1. HTTP/1.0 template)56.692 564.944 Q
(Header field name: Accept\255Script)78.292 588.944 Q
(Applicable protocol: [I7.RFC1945])78.292 612.944 Q
(Status: informational)78.292 636.944 Q(Author/Change controller: IESG)
78.292 660.944 Q
(Specification document\(s\): This document \(when approved and an RFC)
78.292 684.944 Q(number assigned\))114.292 696.944 Q
(Related information: none)78.292 720.944 Q 122.4(Lilly Expires)56.692
768.944 R(September 15, 2005)7.2 E([Page 7])108 E 0 Cg EP
%%Page: 8 8
%%BeginPageSetup
BP
%%EndPageSetup
/F0 12/Courier@0 SF 14.4(Internet\255Draft Indicating)20.182 84.944 R
(and Negotiating Text Script)7.2 E(March 2005)50.4 E
(4.2.5.1.2. HTTP/1.1 template)20.182 108.944 Q
(Header field name: Accept\255Script)41.782 132.944 Q
(Applicable protocol: http)41.782 156.944 Q(Status: standards track)
41.782 180.944 Q(Author/Change controller: IESG)41.782 204.944 Q
(Specification document\(s\): This document \(when approved and an RFC)
41.782 228.944 Q(number assigned\))77.782 240.944 Q
(Related information: none)41.782 264.944 Q
(4.2.5.2. RFC 2295 protocol template)20.182 288.944 Q
(Header field name: Accept\255Script)41.782 312.944 Q
(Applicable protocol: RFC 2295 [I11.RFC2295])41.782 336.944 Q
(Status: experimental)41.782 360.944 Q(Author/Change controller: IESG)
41.782 384.944 Q
(Specification document\(s\): This document \(when approved and an RFC)
41.782 408.944 Q(number assigned\))77.782 420.944 Q
(Related information: none)41.782 444.944 Q(4.2.5.3. HTCPCP template)
20.182 468.944 Q(Header field name: Accept\255Script)41.782 492.944 Q
(Applicable protocol: RFC 2324 [I12.RFC2324])41.782 516.944 Q
(Status: informational)41.782 540.944 Q(Author/Change controller: IESG)
41.782 564.944 Q
(Specification document\(s\): This document \(when approved and an RFC)
41.782 588.944 Q(number assigned\))77.782 600.944 Q
(Related information: none)41.782 624.944 Q 20.182 648.944 EBEGIN
[/Title (5. Media Feature Tag) /Dest (S5.) /OUT pdfmark
EEND 20.182 648.944 EBEGIN
[/Dest (S5.) /Page 8 /View [ /FitH 180 ] /DEST pdfmark
EEND/F0 12/Courier@0 SF(5. Media Feature Tag)20.182 648.944 Q
([I13.BCP31] provides a registration template for registration of)41.782
672.944 Q(media feature tags.)41.782 684.944 Q
(Media feature tags may be used for content)14.4 E(negotiation such as \
in Content\255Alternative, Content\255Features, and)41.782 696.944 Q
(Media\255Accept\255Features fields [I14.RFC2912], [I15.RFC3297],)41.782
708.944 Q([I16.RFC2533], [I17.RFC2738].)41.782 720.944 Q
(The media feature tag registration)14.4 E(appears below.)41.782 732.944
Q 122.4(Lilly Expires)20.182 768.944 R(September 15, 2005)7.2 E
([Page 8])108 E 0 Cg EP
%%Page: 9 9
%%BeginPageSetup
BP
%%EndPageSetup
/F0 12/Courier@0 SF 14.4(Internet\255Draft Indicating)56.692 84.944 R
(and Negotiating Text Script)7.2 E(March 2005)50.4 E 56.692 108.944
EBEGIN
[/Title (5.1. Media Feature Tag Registration Template) /Dest (S5.1.) /OUT pdfmark
EEND 56.692 108.944 EBEGIN
[/Dest (S5.1.) /Page 9 /View [ /FitH 720 ] /DEST pdfmark
EEND/F0 12/Courier@0 SF(5.1. Media Feature Tag Registration Template)
56.692 108.944 Q(Media feature tag name: script)78.292 132.944 Q
(Summary of the media feature indicated by this feature tag:)78.292
156.944 Q(Indication of script\(s\) used in a text document using ISO)
114.292 168.944 Q(standard script name tags)114.292 180.944 Q
(Values appropriate for use with this feature tag:)78.292 204.944 Q 7.2
([]1)99.892 228.944 S 7.2(.T)-7.2 G
(he feature tag is Boolean and may have values of TRUE or)-7.2 E 14.4
(FALSE. A)135.892 240.944 R
(value of TRUE indicates an available capability.)7.2 E 7.2(Av)135.892
252.944 S(alue of FALSE indicates the capability is not available.)-7.2
E([X] 2. The feature has an associated numeric or enumerated value.)
99.892 276.944 Q 7.2([]2)121.492 300.944 S(a. Signed Integer)-7.2 E 7.2
([]2)121.492 324.944 S(b. Rational number)-7.2 E 7.2([]2)121.492 348.944
S(c. Token \(equality relationship\))-7.2 E 7.2([]2)121.492 372.944 S
(d. Token \(ordered\))-7.2 E 7.2([]2)121.492 396.944 S
(e. String \(equality relationship\))-7.2 E
([X] 2f. String \(defined comparison\) Comparison is as)121.492 420.944
Q(case\255insensitive strings.)157.492 432.944 Q
(Strings are compared for)14.4 E(equality only \(no ordering\).)157.492
444.944 Q(The special value "*")14.4 E(matches any script.)157.492
456.944 Q
(The feature tag is intended primarily for use in the following)78.292
480.944 Q(applications, protocols, services, or negotiation mechanisms:)
114.292 492.944 Q(MIME)114.292 504.944 Q
(Examples of typical use: script=Latn)78.292 528.944 Q
(Related standards or documents: [N4.ISO15924], [I2.15924Lists])78.292
552.944 Q(Considerations particular to use in individual applications,)
78.292 576.944 Q(protocols, services, or negotiation mechanisms: none)
114.292 588.944 Q
(Interoperability considerations: Applications developed prior to)78.292
612.944 Q(registration of this tag cannot be expected to recognize the)
114.292 624.944 Q 7.2(tag. Such)114.292 636.944 R
(applications will be unable to participate in script)7.2 E
(content negotiation.)114.292 648.944 Q(Security considerations:)78.292
672.944 Q 122.4(Lilly Expires)56.692 768.944 R(September 15, 2005)7.2 E
([Page 9])108 E 0 Cg EP
%%Page: 10 10
%%BeginPageSetup
BP
%%EndPageSetup
/F0 12/Courier@0 SF 14.4(Internet\255Draft Indicating)20.182 84.944 R
(and Negotiating Text Script)7.2 E(March 2005)50.4 E
(Privacy concerns, related to exposure of personal information:)63.382
108.944 Q(While script may identify an author as belonging to an ethnic)
99.382 120.944 Q(group, and that information might be abused, script)
99.382 132.944 Q(information can be determined from content.)99.382
144.944 Q(Negotiation of)14.4 E
(script may reveal a preference for script, and that)99.382 156.944 Q
(information also has potential for abuse.)99.382 168.944 Q
(Denial of service concerns related to consequences of specifying)63.382
192.944 Q(incorrect values: none known.)99.382 204.944 Q
(Other: none known.)63.382 228.944 Q(Additional information: none)41.782
252.944 Q(Keywords: none)63.382 276.944 Q
(Related feature tags: charset, language)63.382 300.944 Q
(Related media types or data formats: all subtypes of the text)63.382
324.944 Q(media type.)99.382 336.944 Q(Related markup tags: none known)
63.382 360.944 Q
(Name\(s\) & email address\(es\) of person\(s\) to contact for further)
41.782 384.944 Q(information:)77.782 396.944 Q(Bruce Lilly)84.982
420.944 Q(blilly@erols.com)84.982 432.944 Q(Intended usage: COMMON)
41.782 456.944 Q(Author/Change controller: IESG)41.782 480.944 Q
(Requested IANA publication delay: none)41.782 504.944 Q
(Other information: none)41.782 528.944 Q 20.182 552.944 EBEGIN
[/Title (6. Acknowledgments) /Dest (S6.) /OUT pdfmark
EEND 20.182 552.944 EBEGIN
[/Dest (S6.) /Page 10 /View [ /FitH 276 ] /DEST pdfmark
EEND/F0 12/Courier@0 SF(6. Acknowledgments)20.182 552.944 Q
(The author gratefully acknowledges discussions on this topic which)
41.782 576.944 Q
(took place in December 2004 and January 2005 on the IETF discussion)
41.782 588.944 Q(mailing list.)41.782 600.944 Q 20.182 624.944 EBEGIN
[/Title (7. Security Considerations) /Dest (S7.) /OUT pdfmark
EEND 20.182 624.944 EBEGIN
[/Dest (S7.) /Page 10 /View [ /FitH 204 ] /DEST pdfmark
EEND/F0 12/Courier@0 SF(7. Security Considerations)20.182 624.944 Q
(While script may identify an author as belonging to an ethnic group,)
41.782 648.944 Q
(and that information might be abused, script information can be)41.782
660.944 Q(determined from content as noted in section 1.1.2.)41.782
672.944 Q(Negotiation of)14.4 E
(script may reveal a preference for script, and that information also)
41.782 684.944 Q(has potential for abuse.)41.782 696.944 Q 20.182
720.944 EBEGIN
[/Title (8. Internationalization Considerations) /Dest (S8.) /OUT pdfmark
EEND 20.182 720.944 EBEGIN
[/Dest (S8.) /Page 10 /View [ /FitH 108 ] /DEST pdfmark
EEND/F0 12/Courier@0 SF(8. Internationalization Considerations)20.182
720.944 Q(This memo raises no new internationalization considerations.)
41.782 744.944 Q 122.4(Lilly Expires)20.182 768.944 R
(September 15, 2005)7.2 E([Page 10])100.8 E 0 Cg EP
%%Page: 11 11
%%BeginPageSetup
BP
%%EndPageSetup
/F0 12/Courier@0 SF 14.4(Internet\255Draft Indicating)56.692 84.944 R
(and Negotiating Text Script)7.2 E(March 2005)50.4 E 56.692 108.944
EBEGIN
[/Title (9. IANA Considerations) /Dest (S9.) /OUT pdfmark
EEND 56.692 108.944 EBEGIN
[/Dest (S9.) /Page 11 /View [ /FitH 720 ] /DEST pdfmark
EEND/F0 12/Courier@0 SF(9. IANA Considerations)56.692 108.944 Q
(IANA shall register the header field names defined in this document)
78.292 132.944 Q
(\(on approval by the IESG\) in the permanent header field registry.)
78.292 144.944 Q
(IANA shall register the media feature tag defined in this document)
78.292 168.944 Q
(\(on approval by the IESG\) in the IETF tree of the media feature tag)
78.292 180.944 Q(registry.)78.292 192.944 Q 56.692 216.944 EBEGIN
[/Title (Appendix A. Examples) /Dest (SA.1.1.) /OUT pdfmark
EEND 56.692 216.944 EBEGIN
[/Dest (SA.1.1.) /Page 11 /View [ /FitH 612 ] /DEST pdfmark
EEND/F0 12/Courier@0 SF(Appendix A. Examples)56.692 216.944 Q 56.692
240.944 EBEGIN
[/Title (A.1. Script Indication) /Dest (SA.1.1.) /OUT pdfmark
EEND 56.692 240.944 EBEGIN
[/Dest (SA.1.1.) /Page 11 /View [ /FitH 588 ] /DEST pdfmark
EEND/F0 12/Courier@0 SF(A.1. Script Indication)56.692 240.944 Q 56.692
264.944 EBEGIN
[/Title (A.1.1. Simple Example) /Dest (SA.1.1.) /OUT pdfmark
EEND 56.692 264.944 EBEGIN
[/Dest (SA.1.1.) /Page 11 /View [ /FitH 564 ] /DEST pdfmark
EEND/F0 12/Courier@0 SF(A.1.1. Simple Example)56.692 264.944 Q
(MIME\255Version: 1.0)78.292 288.944 Q
(Content\255Type: text/plain ; charset=iso\2552022\255jp\2552)78.292
300.944 Q(Content\255Language: ja)78.292 312.944 Q
(Content\255Script: Hira, Kana)78.292 324.944 Q
(<Japanese language text in a mix of Katakana and Hiragana,)78.292
348.944 Q(ISO 2022-JP-2 charset goes here>)78.292 360.944 Q 56.692
384.944 EBEGIN
[/Title (A.1.2. Multiple Alternatives) /Dest (SA.1.2.) /OUT pdfmark
EEND 56.692 384.944 EBEGIN
[/Dest (SA.1.2.) /Page 11 /View [ /FitH 444 ] /DEST pdfmark
EEND/F0 12/Courier@0 SF(A.1.2. Multiple Alternatives)56.692 384.944 Q
(MIME\255Version: 1.0)78.292 408.944 Q
(Content\255Type: multipart/alternative ; boundary=next)78.292 420.944 Q
(Content\255Language: ja)78.292 432.944 Q(--next)78.292 456.944 Q
(Content\255Type: text/plain ; charset=iso\2552022\255jp\2552)78.292
468.944 Q(Content\255Script: Kana)78.292 480.944 Q
(<Japanese language text in Katakana, ISO 2022-JP-2 charset goes here>)
78.292 504.944 Q(--next)78.292 516.944 Q
(Content\255Type: text/plain ; charset=iso\2552022\255jp\2552)78.292
528.944 Q(Content\255Script: Hira)78.292 540.944 Q
(<Japanese language text in Hiragana, ISO 2022-JP-2 charset goes here>)
78.292 564.944 Q(--next--)78.292 576.944 Q 56.692 600.944 EBEGIN
[/Title (A.2. Script Negotiation) /Dest (SA.2.) /OUT pdfmark
EEND 56.692 600.944 EBEGIN
[/Dest (SA.2.) /Page 11 /View [ /FitH 228 ] /DEST pdfmark
EEND/F0 12/Courier@0 SF(A.2. Script Negotiation)56.692 600.944 Q
(Accept\255Script: Latn ; q = \(foo\) 1, Cyrl ; q = 0.5, * ; q = 0.001)
78.292 624.944 Q
(The example expresses a strong preference for Latin script, followed)
78.292 648.944 Q
(in preference by Cyrillic script, but accepting any script with a low)
78.292 660.944 Q(but non\255zero preference value.)78.292 672.944 Q
56.692 708.944 EBEGIN
[/Title (Appendix B. Change History) /Dest (SB.) /OUT pdfmark
EEND 56.692 708.944 EBEGIN
[/Dest (SB.) /Page 11 /View [ /FitH 120 ] /DEST pdfmark
EEND/F0 12/Courier@0 SF(Appendix B. Change History)56.692 708.944 Q
([[This change history will not be part of a published RFC]])78.292
732.944 Q 122.4(Lilly Expires)56.692 768.944 R(September 15, 2005)7.2 E
([Page 11])100.8 E 0 Cg EP
%%Page: 12 12
%%BeginPageSetup
BP
%%EndPageSetup
/F0 12/Courier@0 SF 14.4(Internet\255Draft Indicating)20.182 84.944 R
(and Negotiating Text Script)7.2 E(March 2005)50.4 E(-00 to -01)41.782
108.944 Q 16.8<8361>63.382 132.944 S(dded this change history)-16.8 E
16.8<8366>63.382 156.944 S(ixed ABNF bug in script production)-16.8 E
16.8<8372>63.382 180.944 S(eformatted ABNF)-16.8 E 16.8<8361>63.382
204.944 S(dded media feature tag description and registration template;)
-16.8 E(revised title accordingly)87.382 216.944 Q(Normative References)
20.182 240.944 Q([N1.BCP14])41.782 264.944 Q 142.582 264.944 EBEGIN
[/Dest (N1) /DEST pdfmark
EEND/F0 12/Courier@0 SF
(Bradner, S., "Key words for use in RFCs to Indicate)142.582 264.944 Q
(Requirement Levels", BCP 14, RFC 2119, March 1997.)142.582 276.944 Q
([N2.RFC2234])41.782 300.944 Q 142.582 300.944 EBEGIN
[/Dest (N2) /DEST pdfmark
EEND/F0 12/Courier@0 SF
(Crocker, D. and P. Overell, "Augmented BNF for Syntax)142.582 300.944 Q
(Specifications: ABNF", RFC 2234, November 1997.)142.582 312.944 Q
([N3.RFC2822])41.782 336.944 Q 142.582 336.944 EBEGIN
[/Dest (N3) /DEST pdfmark
EEND/F0 12/Courier@0 SF
(Resnick, P., "Internet Message Format", RFC 2822, April)142.582 336.944
Q(2001.)142.582 348.944 Q([N4.ISO15924])41.782 372.944 Q 142.582 372.944
EBEGIN
[/Dest (N4) /DEST pdfmark
EEND/F0 12/Courier@0 SF
(International Organization for Standardization \(ISO\),)142.582 372.944
Q("ISO 15924:2004 \255\255 Codes for the representation of)142.582
384.944 Q(names of scripts", March 2003.)142.582 396.944 Q
(Informative References)20.182 420.944 Q([I1.RFC2978])41.782 444.944 Q
156.982 444.944 EBEGIN
[/Dest (I1) /DEST pdfmark
EEND/F0 12/Courier@0 SF
(Freed, N. and J. Postel, "IANA Charset Registration)156.982 444.944 Q
(Procedures", BCP 19, RFC 2978, October 2000.)156.982 456.944 Q
([I2.15924Lists])41.782 480.944 Q 156.982 480.944 EBEGIN
[/Dest (I2) /DEST pdfmark
EEND/F0 12/Courier@0 SF
(ISO has designated The Unicode Consortium as the)156.982 480.944 Q
(ISO 15924 Registration Authority. Lists of ISO 15924)156.982 492.944 Q
(codes may be obtained free of charge from)156.982 504.944 Q
(http://www.unicode.org/iso15924/codelists.html)156.982 516.944 Q
([I3.RFC1958])41.782 540.944 Q 156.982 540.944 EBEGIN
[/Dest (I3) /DEST pdfmark
EEND/F0 12/Courier@0 SF(Carpenter, B., "Architectural Principles of the)
156.982 540.944 Q(Internet", RFC 1958, June 1996.)156.982 552.944 Q
([I4.BCP18])41.782 576.944 Q 156.982 576.944 EBEGIN
[/Dest (I4) /DEST pdfmark
EEND/F0 12/Courier@0 SF
(Alvestrand, H., "IETF Policy on Character Sets and)156.982 576.944 Q
(Languages", BCP 18, RFC 2277, January 1998.)156.982 588.944 Q
([I5.RFC2045])41.782 612.944 Q 156.982 612.944 EBEGIN
[/Dest (I5) /DEST pdfmark
EEND/F0 12/Courier@0 SF
(Freed, N. and N. Borenstein, "Multipurpose Internet)156.982 612.944 Q
(Mail Extensions \(MIME\) Part One: Format of Internet)156.982 624.944 Q
(Message Bodies", RFC 2045, November 1996.)156.982 636.944 Q
([I6.RFC2046])41.782 660.944 Q 156.982 660.944 EBEGIN
[/Dest (I6) /DEST pdfmark
EEND/F0 12/Courier@0 SF
(Freed, N. and N. Borenstein, "Multipurpose Internet)156.982 660.944 Q
(Mail Extensions \(MIME\) Part Two: Media Types",)156.982 672.944 Q
(RFC 2046, November 1996.)156.982 684.944 Q([I7.RFC1945])41.782 708.944
Q 156.982 708.944 EBEGIN
[/Dest (I7) /DEST pdfmark
EEND/F0 12/Courier@0 SF(Berners-Lee, T., Fielding, R., and H. Frystyk,)
156.982 708.944 Q("Hypertext Transfer Protocol -- HTTP/1.0", RFC 1945,)
156.982 720.944 Q(May 1996.)156.982 732.944 Q 122.4(Lilly Expires)20.182
768.944 R(September 15, 2005)7.2 E([Page 12])100.8 E 0 Cg EP
%%Page: 13 13
%%BeginPageSetup
BP
%%EndPageSetup
/F0 12/Courier@0 SF 14.4(Internet\255Draft Indicating)56.692 84.944 R
(and Negotiating Text Script)7.2 E(March 2005)50.4 E([I8.RFC2616])78.292
108.944 Q 193.492 108.944 EBEGIN
[/Dest (I8) /DEST pdfmark
EEND/F0 12/Courier@0 SF 7.2(Fielding, R.,)193.492 108.944 R
(Gettys, J., Mogul, J., Frystyk, H.,)7.2 E
(Masinter, L., Leach, P., and T. Berners-Lee,)193.492 120.944 Q
("Hypertext Transfer Protocol -- HTTP/1.1", RFC 2616,)193.492 132.944 Q
(June 1999.)193.492 144.944 Q([I9.Crocker05])78.292 168.944 Q 193.492
168.944 EBEGIN
[/Dest (I9) /DEST pdfmark
EEND/F0 12/Courier@0 SF
(Crocker, D., "Internet Mail Architecture", Work in)193.492 168.944 Q
(progress \(February 2005\).)193.492 180.944 Q([I10.BCP90])78.292
204.944 Q 193.492 204.944 EBEGIN
[/Dest (I10) /DEST pdfmark
EEND/F0 12/Courier@0 SF(Klyne, G., Nottingham, M., and J. Mogul,)193.492
204.944 Q("Registration Procedures for Message Header Fields",)193.492
216.944 Q(BCP 90, RFC 3864, September 2004.)193.492 228.944 Q
([I11.RFC2295])78.292 252.944 Q 193.492 252.944 EBEGIN
[/Dest (I11) /DEST pdfmark
EEND/F0 12/Courier@0 SF(Holtman, K. and A. Mutz, "Transparent Content)
193.492 252.944 Q(Negotiation in HTTP", RFC 2295, March 1998.)193.492
264.944 Q([I12.RFC2324])78.292 288.944 Q 193.492 288.944 EBEGIN
[/Dest (I12) /DEST pdfmark
EEND/F0 12/Courier@0 SF
(Masinter, L., "Hyper Text Coffee Pot Control Protocol)193.492 288.944 Q
(\(HTCPCP/1.0\)", RFC 2324, April 1998.)193.492 300.944 Q([I13.BCP31])
78.292 324.944 Q 193.492 324.944 EBEGIN
[/Dest (I13) /DEST pdfmark
EEND/F0 12/Courier@0 SF
(Holtman, K., Mutz, A., and T. Hardie, "Media Feature)193.492 324.944 Q
(Tag Registration Procedure", BCP 31, RFC 2506, March)193.492 336.944 Q
(1999.)193.492 348.944 Q([I14.RFC2912])78.292 372.944 Q 193.492 372.944
EBEGIN
[/Dest (I14) /DEST pdfmark
EEND/F0 12/Courier@0 SF(Klyne, G., "Indicating Media Features for MIME)
193.492 372.944 Q(Content", RFC 2912, September 2000.)193.492 384.944 Q
([I15.RFC3297])78.292 408.944 Q 193.492 408.944 EBEGIN
[/Dest (I15) /DEST pdfmark
EEND/F0 12/Courier@0 SF
(Klyne, G., Iwazaki, R., and D. Crocker, "Content)193.492 408.944 Q
(Negotiation for Messaging Services based on Email",)193.492 420.944 Q
(RFC 3297, July 2002.)193.492 432.944 Q([I16.RFC2533])78.292 456.944 Q
193.492 456.944 EBEGIN
[/Dest (I16) /DEST pdfmark
EEND/F0 12/Courier@0 SF
(Klyne, G., "A Syntax for Describing Media Feature)193.492 456.944 Q
(Sets", RFC 2533, March 1999.)193.492 468.944 Q([I17.RFC2738])78.292
492.944 Q 193.492 492.944 EBEGIN
[/Dest (I17) /DEST pdfmark
EEND/F0 12/Courier@0 SF
(Klyne, G., "Corrections to "A Syntax for Describing)193.492 492.944 Q
(Media Feature Sets"", RFC 2738, December 1999.)193.492 504.944 Q
(Author's Address)56.692 528.944 Q(Bruce Lilly)78.292 552.944 Q
(Email: blilly@erols.com)78.292 576.944 Q(Full Copyright Statement)
56.692 600.944 Q 7.2(Copyright \251 The)78.292 624.944 R
(Internet Society \(2005\).)7.2 E
(This document is subject to the rights, licenses and restrictions)
78.292 648.944 Q
(contained in BCP 78, and except as set forth therein, the author)78.292
660.944 Q(retains all his rights.)78.292 672.944 Q
(This document and the information contained herein are provided on an)
78.292 696.944 Q
("AS IS" basis and THE CONTRIBUTOR, THE ORGANIZATION HE REPRESENTS OR)
78.292 708.944 Q
(IS SPONSORED BY \(IF ANY\), THE INTERNET SOCIETY AND THE INTERNET)
78.292 720.944 Q
(ENGINEERING TASK FORCE DISCLAIM ALL WARRANTIES, EXPRESS OR IMPLIED,)
78.292 732.944 Q
(INCLUDING BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE)78.292
744.944 Q 122.4(Lilly Expires)56.692 768.944 R(September 15, 2005)7.2 E
([Page 13])100.8 E 0 Cg EP
%%Page: 14 14
%%BeginPageSetup
BP
%%EndPageSetup
/F0 12/Courier@0 SF 14.4(Internet\255Draft Indicating)20.182 84.944 R
(and Negotiating Text Script)7.2 E(March 2005)50.4 E
(INFORMATION HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED)41.782
108.944 Q
(WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.)
41.782 120.944 Q(Intellectual Property Statement)20.182 144.944 Q
(The IETF takes no position regarding the validity or scope of any)
41.782 168.944 Q
(Intellectual Property Rights or other rights that might be claimed to)
41.782 180.944 Q
(pertain to the implementation or use of the technology described in)
41.782 192.944 Q
(this document or the extent to which any license under such rights)
41.782 204.944 Q
(might or might not be available; nor does it represent that it has)
41.782 216.944 Q
(made any independent effort to identify any such rights.)41.782 228.944
Q(Information)14.4 E
(on the procedures with respect to rights in RFC documents can be)41.782
240.944 Q(found in BCP 78 and BCP 79.)41.782 252.944 Q
(Copies of IPR disclosures made to the IETF Secretariat and any)41.782
276.944 Q
(assurances of licenses to be made available, or the result of an)41.782
288.944 Q
(attempt made to obtain a general license or permission for the use of)
41.782 300.944 Q
(such proprietary rights by implementers or users of this)41.782 312.944
Q(specification can be obtained from the IETF on\255line IPR repository\
 at)41.782 324.944 Q(http://www.ietf.org/ipr.)41.782 336.944 Q
(The IETF invites any interested party to bring to its attention any)
41.782 360.944 Q
(copyrights, patents or patent applications, or other proprietary)41.782
372.944 Q
(rights that may cover technology that may be required to implement)
41.782 384.944 Q(this standard.)41.782 396.944 Q
(Please address the information to the IETF at)14.4 E
(ietf\255ipr@ietf.org.)41.782 408.944 Q(Acknowledgment)20.182 432.944 Q
(Funding for the RFC Editor function is currently provided by the)41.782
456.944 Q(Internet Society.)41.782 468.944 Q 122.4(Lilly Expires)20.182
768.944 R(September 15, 2005)7.2 E([Page 14])100.8 E 0 Cg EP

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%!Description: PostScript ISO A4 version of draft-lilly-content-script-02
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