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This differs from RFC 1866.
17.3 The FORM element: [p.222] Addition of the name attribute for backwards
compatibility.
17.3 The FORM element: [p.222] Removed the reference to the "mailto" URI in
the "action" attribute definition.
17.3 The FORM element: [p.222] Removed "mailto" example near end of
section since behavior not defined in this spec.
17.3 The FORM element: [p.222] The accept attribute is added to the DTD
fragment. Also, the description of the accept-charset attribute is amended.
17.4 The INPUT element: [p.224] Added missing "ismap" for the INPUT
element. Also, in definition of value., add "checkbox" to values of type that
require a value.
17.6.1 [p.231] : When no option is preselected, user agent behavior is
undefined. Authors should supply and explicit none option to cover this case.
This behavior differs from RFC 1866.
SGML Declaration
SGML Declaration of HTML 4: [p.263] Removed text about up-to-date
references to ISO 10646. Replaced with: "Revisions of the HTML 4 specification
may update the reference to ISO 10646 to include additional changes."
Strict DTD
vspace/hspace/border attributes for IMG, OBJECT, APPLET in pixels.
Changed content model of MAP to ((%block;) | AREA)+
Added "ismap" attribute to INPUT
The accept attribute is added to the DTD fragment for the FORM element.
The axis attribute comment has been changed to refer to a comma-separated
list.
The archive attribute for the OBJECT element takes a value of type CDATA
instead of type %URI since the value is a space-separated list of URIs.
Notes
Notes [p.350] Updated notes on accessibility to point to Web Content
Accessibility Guidelines.
315 24 Dec 1999 18:26
HTML 4 Changes
References
Updated links to RFCs to use http://www.ietf.org/rfc
Put links in titles.
Added revised date of 27 Aug 1998 for [DATETIME]
Added revised date of 11 Jan 1999 for [CSS1].
Publication date of [CSS2] fixed.
[UNICODE] has been updated to version 3.0
[ISO10646] has been updated to allow for new character assignments. Note that
amendment five is specifically taken into account.
[RFC1766] expected to be updated.
[RFC2279] obsoletes [RFC2044].
[RFC2616] obsoletes [RFC2068].
[RFC2388] added in addition to [RFC1867].
[LEXHTML] address updated, date added.
[DCORE] address updated.
Updated [WEBSGML]
[HTML3STYLE] address updated.
Added [RDF10] (replaced old RDF)
Changed [WAIGUIDE] -> [WAI]
Added informative references [WCGL], [UAGL], and [ATGL]
Updated URI reference to [URI] (RFC 2396).
A.1.2 Errors that were corrected
Section 13.6.1 [p.174]
Image map examples using "poly" have been fixed to form a closed polygon.
Also, the last pair of coordinates is the same as the first to close the polygon.
Section 14.4.1 [p.192]
In the final example, the STYLE element is missing the attribute assignment
"media=screen, print".
Section 15.2.1 [p.199]
In the example with "mypar", the CSS rule should read
P#mypar {font-style: italic; color: blue}
In CSS, "#" refers to an ID name while the "." refers to a class name. This
example is dealing with the "id" attribute.
Section 16.2.2 [p.209]
Values for marginwidth and marginheight must be 0 pixels or more, not 1
pixel or more.
Section 16.2.2 [p.209]
The FRAME element does not take the target attribute.
24 Dec 1999 18:26 316
HTML 4 Changes
Section 16.5 [p.217]
The IFRAME element does not take the target attribute.
Section 17.2.1 [p.221]
In the description of "checkboxes", change "selected" to "checked" in "when the
control element s selected attribute is set."
Section 17.6.1 [p.231]
In the "Attributes defined elsewhere" section for the OPTGROUP element, the
attributes onfocus, onblur, and onchange should not be there.
Section 18.2.3 [p.254]
To the list of elements that take onfocus and onblur, add A and AREA.
Section 20 [p.263]
The SGML Declaration for HTML 4 must be modified slightly to support
hexadecimal numeric character references. The lines:
DELIM
GENERAL SGMLREF
SHORTREF SGMLREF
must be changed to:
DELIM
GENERAL SGMLREF
HCRO "&#x" -- 38 is the number for ampersand --
SHORTREF SGMLREF
And the initial
"ISO 8879:1986 (WWW)".
Section 21 [p.265]
The HR element should also take the lang and dir attributes. These are noted
as being defined elsewhere at the element s definition, but were left out of the
DTDs.
Section 21 [p.265]
The OBJECT element s archive attribute is defined in the DTD as taking a
value of type %URI". This is incorrect: the value may be a space-separated list
of URIs (as indicated in the definition of the attribute and in the DTD comment).
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