My opinion:  use NAMES not CDATA.
Registration should be through W3C or IETF.
Murray
> 
> There is one inconsistency that I need to ask about now.
> 
> In Section 2.8.3 in the paragraph under REL:
> 
>     ... The attribute value is a comma-separated list of relationship
>     values.  Values and their semantics will be registered by the
>     HTML registration authority.
> 
> but, the DTD says:
> 
>     <!ENTITY % linkType "NAME"
>         -- a list of these will be specified at a later date -->
> 
>     <!ENTITY % linkExtraAttributes
>         "REL %linkType #IMPLIED
>          REV %linkType #IMPLIED
>     ...
>     
> A "comma-separated list" is clearly not going to fit in a NAME.
> However, the list is what was defined in the original WWW design
> notes, and I think multiple relations per link is still desired.
> Therefore, we can either change it to a whitespace separated list:
> 
>     <!ENTITY % linkType "NAMES">
> 
> or stick with the original comma-separated list:
> 
>     <!ENTITY % linkType "CDATA">
> 
> What's it going to be?
> 
> Also, note the reference to an "HTML registration authority".
> We need to define this (the same is true for HTTP).  Since the link
> names have more to do with the overall hypertext relationship model,
> I think the registry will have to be at W3C.  Therefore, we should ask
> someone at W3C (Dan? Dave?) to set up a registry and a semi-permanent
> URL to which the spec can point.
> 
> 
>  ....Roy T. Fielding  Department of ICS, University of California, Irvine USA
>                                        <fielding@ics.uci.edu>
>                       <URL:http://www.ics.uci.edu/dir/grad/Software/fielding>