+	2.0	3.0	3.2	4.0
1.0	2.0	3.0	4.0
1.0	2.0	3.0	4.0
1.0	2.0
1.0	2.1
0.9

<nextid>

container
start tag	required
end tag	required

Sandia Reference

This element is used by text generated software in creating identifiers; its attribute N, is used to define the next identifier to be allocated by the text generator program. Normally, human writers of HTML don't use this element; and Web Browsers ignore this element.
Example:
<head>
<nextid n="t35">
... </head>

Users of line browsers will be quite familiar with this concept. All anchors are identified in the text and gathered later in the document for the reader to access.

MSIE 3.0 DTD does not specify common attributes for this tag. It may be an oversight, or their use not practical.

class=

1.0 2.0 3.0 4.0

id=

1.0 2.0 3.0 4.0

Warning: there are two possible meanings of this particular use of "id=". There is the normal use of "id=" and follow the link on the attribute name for more information on that use.
The second meaning is used exclusively by WebTV. It is the same as the "name=" attribute below so the explanation is shared. Their description is as follows:
"The name attribute can be used with client functions. However, client functions are not recommended for content developers. These functions are intended for use by WebTV Networks for developing basic WebTV functionality."

lang=

1.0 2.0 3.0 4.0

list of language codes
list of country codes

n=

+ 2.0 3.0 3.2 4.0

1.0 2.0 3.0 4.0

"The identifier should take the form of zero or more letters followed by one or more digits. The numeric suffix should be incremented to generate successive identifiers. e.g. " (HTML+)