validity
Click on the red underlined text to get to the source
... NICOL]. A foremost consideration is
to make sure that HTML remains a valid application of SGML, while
enabling its use with all languages ...
... All HTML 2.0 conforming documents remain conforming with this
specification. However, the extensions introduced here make valid
certain documents that would not be HTML 2.0 conforming, in
...
... ISO-8859-1, but within that of
UCS-4 become valid SGML characters. Another is that the upper limit
of the range ...
... of the range of numeric character references is extended from 255 to
2147483645; thus, И is a valid reference to a "CYRILLIC CAPITAL
LETTER I". [ERCS] is a good source of information on Unicode ...
... user did not modify this value), it cannot be guaranteed to be
transmitted as a sequence of octets identical to that in the
source document -- only as a possibly different but valid encoding
of the same sequence of text elements ...
... HTML.Highlighting "INCLUDE"
-- Use this feature test entity to validate that a
document uses no highlighting tags, which may be
...
... HTML.Forms "INCLUDE"
-- Use this feature test entity to validate that a document
contains no forms, which may not be supported in minimal
implementations
...