Coding mbox_sha1sum in XFN

Julian Bond wrote:

> I want to be able to say something like:-
> This person with this profile page URL and this
mbox_sha1sum is one of
> my contacts.
>
> But I'm not sure how to do it in XFN. Where can I put
mbox_sha1sum  
> into
> <a href="url" rel="contact>their
name</a>

For the href attribute, you could use a (non-standard, but
frequently  
used[1]) SHA1 URN:

	<a
href="urn:sha1:052f384479559f1b4854756bdce69d1c658de3b3
"
	rel="contact">Their Name</a>

It should be supported by most XFN parsers that treat the
URL as  
basically an opaque identifying string. Any XFN parsers that
assume  
that the href attribute will be an HTTP URI may have
problems, but  
that would be their own fault for making such an
assumption.

Of course, if you're using it on a web page designed for
humans, you  
should bear in mind that people clicking on the links might
get  
confusing error messages if they don't have any program
configured to  
handle such URIs (and I can't imagine that any such programs
exist!),  
so it might be inadvisable to use such links on such a web
page. One  
way of mitigating this problem might be to style these
"urn:" links  
(using CSS) as if they were plain, non-link text. (Don't
forget to  
use the CSS "cursor" property to disable the
pointing hand cursor.)

____
1. Google for "urn:sha1" (in quotes) returns
almost a quarter of a  
million results. It's mostly used for P2P, but that
shouldn't stop us  
re-employing it here.

-- 
Toby A Inkster
<mailto:mailtobyinkster.co.uk>
<http://tobyinkster.co.uk
>



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Hello Julian, Toby

On Sat, 2008-04-26 at 11:48 +0100, Toby A Inkster wrote:
> Julian Bond wrote:
> 
> > I want to be able to say something like:-
> > This person with this profile page URL and this
mbox_sha1sum is one
> of
> > my contacts.
> >
> > But I'm not sure how to do it in XFN. Where can I
put mbox_sha1sum  
> > into
> > <a href="url"
rel="contact>their name</a>
> 
> For the href attribute, you could use a (non-standard,
but
> frequently  
> used[1]) SHA1 URN:
> 
>         <a
href="urn:sha1:052f384479559f1b4854756bdce69d1c658de3b3
"
>         rel="contact">Their
Name</a>

There Is no real way to do this in Microformats (as far as I
know) but
there has been some work on hashes[1] and digital
signatures[2], you are
maybe even asking the wrong community, and you should maybe
ask the
RDFa[3] community as what you are asking is possible in
RDFa:

<a property="foaf:sha1sum"
href="mailto:theirname.com" rel="contact"
content="052f384479559f1b4854756bdce69d1c658de3b3"
>Their Name</a>



[1] http://mic
roformats.org/wiki/hash-examples
[2] http:
//microformats.org/wiki/digital-signatures
[3] http://rdfa.info/wiki
/RDFa_Wiki


Thanks

Martin McEvoy



 

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