Not to index but still follow links: other solution than <noindex>?

Hi,

I would like not to index some part of a document but still follow links. I 
have read in the FAQ that <noindex follow> tag can be used for that:
...
<noindex follow>
bla bla
</noindex>
...

The problem is that the html document is then not conformed to html dtd. So I 
wonder if there is other solutions to do that? <!--htdig_noindex--> can be 
used to prevent indexing but htdig will not follow links too then. And It 
seems that no <!--htdig_noindex_follow--> tag exist? Something I miss?

Thank,

-- 
Mathieu Peltier