Tim Bray today links to different taxonomies by different bloggers:
Some of these taxonomies are nested, other are flat.
Looking
at them I still
think that we could easily use this metadata with the approach we are taking for K-collector. You can almost instantly notice
how several identical topics used in more than one of the taxonomies
linked above. A lot of them also appear on our
k-collector site.
Where
everything breaks is in the RSS feeds. Let's see how each blogger
include (or doesn't include) topics/categories in his feed:
Bray:Apparently there are no category/topic information in his feed.
Walsh:
<dc:subject xmlns:dc="http://purl.org/dc/elements/1.1/" rdf:resource="http://norman.walsh.name/knows/taxonomy#TOPIC1"/>
<dc:subject xmlns:dc="http://purl.org/dc/elements/1.1/" rdf:resource="http://norman.walsh.name/knows/taxonomy#TOPIC2"/>
Pilgrim:Apparently there are no category/topic information in his feed, but there are per-category feeds.
Winer:
<category>/TOPIC1/TOPIC2</category>
To make things worse, I use yet another method to describe topics in my feeds: ENT.
Bottom
line? I guess that it all boils down to what we want to do with these
taxonomies. As long as they are simply a tool used by every author to
organize what he writes there are not going to be problems or
conflicts.
The day we will want to be able to compare opinions
about the same topics expressed by different authors, possibly in the
same page, a solution will have to be found.