ben at pirt.co.uk
Wed Feb 4 09:56:52 UTC 2004
On 4 Feb, 2004, at 09:47, Ian Davis wrote:
> Hi Morten,
>>> property: foaf:mboxsha1sum (clarification)
>>> Other things that need fixing: clarification to mboxsha1sum re
>>> 0s. Suggestions on this would be welcomed.
>> I haven't read the sha1 spec, but it seems to me that the leading 0s
>> should be preserved. Also, there are some casing issues with
>> case-insentive hostnames that should be clarified/resolved...
> This shouldn't be a problem since the sha1 is the hash of a URI and
> , since URIs are opaque identifiers, one shouldn't examine the case of
> the characters that make up the URI. This is wider RDF issue anyway
> since the URIs mailto:iand at internetalchemy.org and
> mailto:IanD at InternetAlchemy.org are different identifiers even though
> they identify the same resource.
Even though they are different identifiers, mail to both of these
addresses would reach the same recipient.
In terms of usability, if I knew you email address and wanted to look
up your foaf and you had used capitals, but I used IanD then from the
sha1 I wouldn't be able to find you. I think this is quite a major
Personally, I think the spec should state that the sha1 hash is made up
of the mailto: plus the lower case email address, this way we can be
sure of a certain match and it would make the whole network more
reliable when it comes to looking people up.
> http://internetalchemy.org | http://purl.org/NET/iand
> Working on... Pepys <http://www.innovateer.com/products/pepys/>
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> wiki: http://rdfweb.org/topic/FoafProject
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