The parsing section says that < in an unquoted attribute value terminates
the tag. However, according to my testing[1], IE7, Gecko, Opera and Webkit
don't do this -- they append the < to the attribute value. So I think the
parsing section is wrong here.
Relevant part of the spec:
Attribute value (unquoted) state
Consume the next input character:
[...]
U+003C LESS-THAN SIGN (<)
EOF
Parse error. Emit the current tag token. Reconsume the character
in the data state.
s/U+003C LESS-THAN SIGN (<)//
Additionally, the syntax section says that authors are not allowed to use
< in unquoted attribute values, which should probably be changed if the
parsing section is changed.
Relevant part of the spec:
Unquoted attribute value syntax
The attribute name, followed by zero or more space characters,
followed by a single U+003D EQUALS SIGN character, followed by zero
or more space characters, followed by the attribute value, which, in
addition to the requirements given above for attribute values, must
not contain any literal space characters, U+003E GREATER-THAN SIGN
(>) characters, or U+003C LESS-THAN SIGN (<) characters, and must
not, furthermore, start with either a literal U+0022 QUOTATION MARK
(") character or a literal U+0027 APOSTROPHE (') character.
s/, U+003E/, or U+003E/
s/, or U+003C LESS-THAN SIGN (<) characters//
[1] http://simon.html5.org/test/html/parsing/tokenisation/unquoted/
--
Simon Pieters
