パラメータとしてURIを含む錨・埋め込み画像・その他すべての要素は、利用者の入力に応じてURIを書き換えられるようにすることができます。この場合のセキュリティへの配慮は[URL]に従っています。
書式送信要求で広く使われる方法――HTTPとSMTP――では、秘匿性についてほとんど保証されません。 取り扱いに慎重を要する情報を書式――特に「 PASSWORD 」型記入欄による方法（8.1.2,「入力フィールド：INPUT」参照）――によって求める情報提供者はこれに留意すべきであり、利用者に秘匿性の不足について理解させるようにするべきです。
[URI]
Berners-Lee, T., "Universal Resource Identifiers in WWW:
A Unifying Syntax for the Expression of Names and
Addresses of Objects on the Network as used in the
World- Wide Web", RFC 1630, CERN, June 1994.
<URL:ftp://ds.internic.net/rfc/rfc1630.txt>
[URL]
Berners-Lee, T., Masinter, L., and M. McCahill, "Uniform
Resource Locators (URL)", RFC 1738, CERN, Xerox PARC,
University of Minnesota, December 1994.
<URL:ftp://ds.internic.net/rfc/rfc1738.txt>
[HTTP]
Berners-Lee, T., Fielding, R., and H. Frystyk Nielsen,
"Hypertext Transfer Protocol - HTTP/1.0", Work in
Progress, MIT, UC Irvine, CERN, March 1995.
[MIME]
Borenstein, N., and N. Freed. "MIME (Multipurpose
Internet Mail Extensions) Part One: Mechanisms for
Specifying and Describing the Format of Internet Message
Bodies", RFC 1521, Bellcore, Innosoft, September 1993.
<URL:ftp://ds.internic.net/rfc/rfc1521.txt>
[RELURL]
Fielding, R., "Relative Uniform Resource Locators", RFC
1808, June 1995
<URL:ftp://ds.internic.net/rfc/rfc1808.txt>
[GOLD90]
Goldfarb, C., "The SGML Handbook", Y. Rubinsky, Ed.,
Oxford University Press, 1990.
[DEXTER]
Frank Halasz and Mayer Schwartz, "The Dexter Hypertext
Reference Model", Communications of the ACM, pp.
30-39, vol. 37 no. 2, Feb 1994.
[IMEDIA]
Postel, J., "Media Type Registration Procedure",
RFC 1590, USC/Information Sciences Institute, March 1994.
<URL:ftp://ds.internic.net/rfc/rfc1590.txt>
[IANA]
Reynolds, J., and J. Postel, "Assigned Numbers", STD 2,
RFC 1700, USC/Information Sciecnes Institute, October
1994. <URL:ftp://ds.internic.net/rfc/rfc1700.txt>
[SQ91]
SoftQuad. "The SGML Primer", 3rd ed., SoftQuad Inc.,
1991. <URL:http://www.sq.com/>
[ISO-646]
ISO/IEC 646:1991 Information technology -- ISO 7-bit
coded character set for information interchange
<URL:http://www.iso.ch/cate/d4777.html>
[ISO-10646]
ISO/IEC 10646-1:1993 Information technology -- Universal
Multiple-Octet Coded Character Set (UCS) -- Part 1:
Architecture and Basic Multilingual Plane
<URL:http://www.iso.ch/cate/d18741.html>
[ISO-8859-1]
ISO 8859. International Standard -- Information
Processing -- 8-bit Single-Byte Coded Graphic Character
Sets -- Part 1: Latin Alphabet No. 1, ISO 8859-1:1987.
<URL:http://www.iso.ch/cate/d16338.html>
[SGML]
ISO 8879. Information Processing -- Text and Office
Systems - Standard Generalized Markup Language (SGML),
1986. <URL:http://www.iso.ch/cate/d16387.html>