- From: Chimezie Ogbuji <ogbujic@bio.ri.ccf.org>
- Date: Fri, 29 Sep 2006 17:52:25 -0400 (EDT)
- To: Harry Halpin <hhalpin@ibiblio.org>
- cc: public-grddl-wg <public-grddl-wg@w3.org>
The paragraph before the first XFN snippet (starts with 'Another
microformat..'):
Another microformat that allows for more information to be gleaned from
the document is XFN. XFN is the XHTML Friends Network. XFN outlines
relationships between individuals using a controlled set of values in the
rel attributes of links. Examples of such relationships are friends,
colleagues, co-workers, etc.
Since XFN relationships are embedded in anchor ('a') elements they can be
expressed (in RDF) as rdfs:seeAlso relationships between additional RDF
graphs, foaf:knows relationships between people, properties constructed
using the XFN namespace and the corresponding rel values, and appropriate
terms from the relationship vocabulary [1].
These descriptions allow an RDF spider (a scutter) to follow links to additional RDF content that may also
include vCard and FOAF descriptions. In addition, the use of these
well-established RDF vocabulary terms for the relationships lend a certain
amount of authority to what the XFN markup in the original source document
express in XHTML.
I wasn't sure what to do with the paragraphs leading up to the rel='me'
snippet or the one afterwards...
For the paragraph starting with 'Stephan's friend Peter Smith..':
Stephan's friend Peter Smith writes several reviews of a new guitars. Each
review has a link to the reviewer's profile page on the review site.
Stephan know that the profile page belongs to Peter by visual inspection,
but a machine does not. Luckily, Peter's profile page can link back to
his own personal site using a rel="me" XFN link. This allows an RDF
client to infer that the Peter on the Guitar site is the same Peter linked
from Stephan's page.
For the paragraph starting with 'The first restriction on ...':
The first restriction on the data can be a check on review data such as
rating. Once we have all the matching reviews, we can then restricted
based on Stephan's friends. From the XFN links in Stephan's page which
identify people Stephan trusts, we can match URIs to other locations where
they have been asserted (the guitar review page for instance).
Received on Friday, 29 September 2006 21:52:32 UTC