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IETF RFC 2957
The application/whoispp-query Content-Type
Last modified on Tuesday, October 3rd, 2000
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Network Working Group L. Daigle
Request for Comments: 2957 Thinking Cat Enterprises
Category: Informational P. Faltstrom
Cisco Systems Inc.
October 2000
The application/whoispp-query Content-Type
 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 © The Internet Society (2000). All Rights Reserved.
Abstract
This document defines the expression of Whois++ protocol (RFC 1835)
queries within MIME (Multipurpose Internet Mail Extensions) (RFC
2046) media types. The intention of this document, in conjunction
with RFC 2958 is to enable MIME-enabled mail software, and other
systems using Internet media types, to carry out Whois++
transactions.
1. MIME Registration Information
To: iana@isi.edu
Subject: Registration of MIME media type application/whoispp-query
MIME Type name: Application
MIME subtype name: whoispp-query
Required parameters: none
Optional parameters: none
Encoding considerations: Any valid MIME encodings may be used
Security considerations: This content-type contains purely
descriptive information (i.e., no directives). There are security
considerations with regards to the appropriateness (privacy) of
information provided through the use of this content-type, and the
authenticity of the information so-provided. This content-type
Daigle & Faltstrom Informational PAGE 1 
RFC 2957 application/whoispp-query Content-Type October 2000
provides no native mechanisms for authentication.
Published specification: this document
Person & email address to contact for further information:
Leslie L. Daigle
leslie@thinkingcat.com
Intended usage: common
2. whoispp-query Syntax
The following grammar, which uses BNF-like notation as defined in
[RFC 2234] defines the set of acceptable input to a Whois++ server.
As such, it describes the expected structure of a whoispp-query media
type object.
N.B.: As outlined in the ABNF definition, rule names and string
literals are in the US-ASCII character set, and are case-insensitive.
whois-command = ( system-command / terms [":" globalcnstrnts] )
nl
system-command = "constraints" / "describe" / "commands" /
"polled-by" / "polled-for" / "version" / "list" /
"show" [1*sp bytestring] / "help" [1*sp
bytestring] / "?" [bytestring]
terms = and-expr *("or" and-expr)
and-expr = not-expr *("and" not-expr)
not-expr = ["not"] (term / ( "(" terms ")" ))
term = ( generalterm / specificterm / combinedterm )
localcnstrnts
generalterm = bytestring
specificterm = specificname "=" bytestring
specificname = "handle" / "value" / "template"
combinedterm = attributename "=" bytestring
globalcnstrnts = globalcnstrnt *(";" globalcnstrnt)
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RFC 2957 application/whoispp-query Content-Type October 2000
globalcnstrnt = "format" "=" format / "maxfull" "=" 1*digit /
"maxhits" "=" 1*digit / "case" "=" casevalue /
"search" "=" searchvalue / opt-globalcnst
opt-globalcnst = "authenticate" "=" auth-method / "language" "="
language / "incharset" "=" characterset /
"outcharset" "=" characterset / "ignore" "="
attriblist / "include" "=" attriblist
localcnstrnts = 0*(";" localcnstrnt)
localcnstrnt = "case" "=" casevalue / "search" "=" searchvalue
format = "full" / "abridged" / "handle" / "summary" /
"server-to-ask"
auth-method = bytestring
language = <The language code defined in RFC 1766 [ALVE95]>
characterset = "us-ascii" / "iso-8859-1" / "iso-8859-2" / "iso-
8859-3" / "iso-8859-4" / "iso-8859-5" / "iso-
8859-6" / "iso-8859-7" / "iso-8859-8" / "iso-
8859-9" / "iso-8859-10" / "UNICODE-1-1-UTF-8" /
"UNICODE-2-0-UTF-8" "UTF-8"
;"UTF-8" is as defined in [RFC 2279]. This is
;the character set label that should be used
;for UTF encoded information; the labels
;"UNICODE-2-0-UTF-8" and "UNICODE-1-1-UTF-8"
;are retained primarily for compatibility with
;older Whois++ servers (and as outlined in
;[RFC 2279]).
searchvalue = "exact" / "substring" / "regex" / "fuzzy" /
"lstring"
casevalue = "ignore" / "consider"
bytestring = 0*charbyte
attributename = 1*attrbyte
attriblist = attributename 0*("," attributename)
charbyte = "\" specialbyte / normalbyte
normalbyte = <%d33-255, except specialbyte>
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RFC 2957 application/whoispp-query Content-Type October 2000
attrbyte = <%d33-127 except specialbyte> /
"\" <specialbyte except
":" " " tab nl>
specialbyte = " " / tab / "=" / "," / ":" / ";" / "\" /
"*" / "." / "(" / ")" /
"[" / "]" / "^" /
"$" / "!" / "?"
tab = %d09
sp = %d32 ; space
digit = "0" / "1" / "2" / "3" / "4" /
"5" / "6" / "7" / "8" /
"9"
nl = %d13 %d10 ; CR LF
NOTE: Blanks that are significant to a query must be escaped. The
following characters, when significant to the query, may be preceded
and/or followed by a single blank:
: ; , ( ) = !
3. Security Considerations
Security issues are discussed in section 1.
4. References
[ALVE95] Alvestrand H., "Tags for the Identification of Languages",
RFC 1766, March 1995.
[RFC 2234] Crocker, D. and P. Overell, "Augmented BNF for Syntax
Specifications: ABNF", RFC 2234, November 1997.
[RFC 2958] Daigle, L. and P. Faltstrom, "The application/whoispp-
response Content-type", RFC 2958, October 2000.
[RFC 1835] Deutsch, P., Schoultz, R., Faltstrom, P. and C. Weider,
"Architecture of the WHOIS++ service", RFC 1835, August
1995.
[RFC 2046] Freed, N. and N. Borenstein, "Multipurpose Internet Mail
Extensions (MIME) Part Two: Media Types", RFC 2046,
November 1996.
Daigle & Faltstrom Informational PAGE 4
RFC 2957 application/whoispp-query Content-Type October 2000
[HARR85] Harrenstein K., Stahl M. and E. Feinler, "NICNAME/WHOIS",
RFC 954, October 1985.
[POST82] Postel J., "Simple Mail Transfer Protocol", STD 10, RFC
821, August 1982.
[IIIR] Weider C. and P. Deutsch, "A Vision of an Integrated
Internet Information Service", RFC 1727, December 1994.
[WINDX] Weider, C., Fullton, J. and S. Spero, "Architecture of the
Whois++ Index Service", RFC 1913, February 1996.
[RFC 2279] Yergeau F., " UTF-8, a transformation format of ISO 10646",
RFC 2279, January 1998.
5. Authors' Addresses
Leslie L. Daigle
Thinking Cat Enterprises
Email: leslie@thinkingcat.com
Patrik Faltstrom
Cisco Systems Inc
170 W Tasman Drive SJ-13/2
San Jose CA 95134
USA
EMail: paf@cisco.com
URL: http://www.cisco.com
Daigle & Faltstrom Informational PAGE 5
RFC 2957 application/whoispp-query Content-Type October 2000
6. Full Copyright Statement
Copyright © The Internet Society (2000). 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.
Daigle & Faltstrom Informational PAGE 6
The application/whoispp-query Content-Type
RFC TOTAL SIZE: 10262 bytes
PUBLICATION DATE: Tuesday, October 3rd, 2000
LEGAL RIGHTS: The IETF Trust (see BCP 78)
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