The original specification for this obsolete element states that it be used
to stop the parsing of HTML tags by the browser. What follows after is not
SGML. The PLAINTEXT element specification did not accept a closing tag. The
text after the opening PLAINTEXT tag is typically rendered as a fixed-width font.
This element is no longer standard HTML. It is considered "obsolete"
in the HTML 2.0 , 3.0 and 3.2 specifications, and is not mentioned in HTML 4.0
and beyond. It may be implemented by browsers for backward compatibility.
This is an SGML Document Access
(SDA) attribute. SDA attributes are designed to transform HTML (and
other SGML-based documents) to the ICADD
DTD - which is used in creating accessible documents for users with
visual disabilities (rendering in Braille, large print, speech
synthesis, etc.) The attribute value specifies the name of the element
to convert this element to in the SDA element group (in this case the
'Lit' element - "literal or computer text".)
Value:Lit (Denotes 'literal or computer text' in SDA.)
<plaintext>this is text that is
not evaluated by the browser
DTD Note: This element is listed as an "Obsolete
Element" in the HTML 2.0 DTD. It is still listed under "Deprecated
Elements" in the expired HTML 3.0 draft and HTML 3.2 recommendation
and is still understood by some browsers.
There is little reason why this element should ever be used.
Use at your own risk. Because the support and syntax are so erratic between
browsers, consistent behavior can never be guaranteed.
All Opera versions, IE4+, and Netscape up to version 6.0 support the original
PLAINTEXT specification which did not accept a closing tag.
Internet Explorer up to version 3, Netscape 6.1+ and all Mosaic versions
provide for a closing tag. A closing tag would allow placement in regions
other than the end of a HTML document.