On Fri, 02 Sep 2011 01:03:08 +0200, John Boyer <[email protected]> wrote:
Dear Working Group,
In Section 8.1.1 of [1], the allowable DOCTYPE declarations for HTML5 are
given. There is a highly recommended shortest version as well as some
legacy and obsolete alternatives. However, none of the alternatives seem
to allow an author to define entities to be used within the document. Is
this intentional or an oversight?
[1] http://www.w3.org/TR/html5/syntax.html#the-doctype
It is intentional. Note that this section only applies to text/html
content.
As an example, it seems that an internal dtd subset that looks like this
should be admissible:
<!DOCTYPE html [
<!ENTITY ent "Big mobile tree">
]>
Which would then allow &ent; to be used in the HTML content.
The HTML parser does not support this.
Particularly for the XML syntax variant served out under application/xml
or application/xhtml+xml, it seems it would be challenging to turn off
the
ability to define and use entities as the mechanism is built into the
underlying XML parser.
It is allowed in XML (see the section "The XHTML syntax").
However, I am asking specifically about whether
the above declaration is also allowed in non-XML content served as
text/html?
No.
--
Simon Pieters
Opera Software
