2011 May 22, 10:36Notes and suggestions for private use fields in protocols and formats.
ietf rfc protocol technical private-use 2008 Aug 25, 10:13
As noted previously, my page consists of the
aggregation of my various feeds and in working on that code recently it was again brought to my attention that everyone has different ways of representing tag metadata in feeds. I made up a
list of how my various feed sources represent tags and list that data here so that it might help others in the future.
Tag markup from various sources
|
Source
|
Feed Type
|
Tag Markup Scheme
|
One Tag Per Element
|
Tag Scheme URI
|
Human / Machine Names
|
Example Markup
|
|
LiveJournal
|
Atom
|
atom:category
|
yes
|
no
|
no
|
, (source)
|
|
LiveJournal
|
RSS 2.0
|
rss2:category
|
yes
|
no
|
no
|
technical
(soure)
|
|
WordPress
|
RSS 2.0
|
rss2:category
|
yes
|
no
|
no
|
, (source)
|
|
Delicious
|
RSS 1.0
|
dc:subject
|
no
|
no
|
no
|
photosynth photos 3d tool
(source)
|
|
Delicious
|
RSS 2.0
|
rss2:category
|
yes
|
yes
|
no
|
domain="http://delicious.com/SequelGuy/">
hulu
(source)
|
|
Flickr
|
Atom
|
atom:category
|
yes
|
yes
|
no
|
term="seattle"
scheme="http://www.flickr.com/photos/tags/" />
(source)
|
|
Flickr
|
RSS 2.0
|
media:category
|
no
|
yes
|
no
|
scheme="urn:flickr:tags">
seattle washington baseball mariners
(source)
|
|
YouTube
|
RSS 2.0
|
media:category
|
no
|
no
|
no
|
label="Tags">
bunny rabbit yawn cadbury
(source)
|
|
LibraryThing
|
RSS 2.0
|
No explicit tag metadata.
|
no
|
no
|
no
|
n/a, (source)
|
Tag markup scheme
|
Tag Markup Scheme
|
Notes
|
Example
|
Atom Category
atom:category
xmlns:atom="http://www.w3.org/2005/Atom"
|
-
category/@term
-
Required category name.
-
category/@scheme
-
Optional IRI id'ing the categorization scheme.
-
category/@label
-
Optional human readable category name.
|
term="catName"
scheme="tag:deletethis.net,2008:tagscheme"
label="category name in human readable format"/>
|
RSS 2.0 category
rss2:category
empty namespace
|
-
category/@domain
-
Optional string id'ing the categorization scheme.
-
category/text()
-
Required category name. The value of the element is a forward-slash-separated string that identifies a hierarchic location in the indicated taxonomy. Processors may establish conventions
for the interpretation of categories.
|
domain="tag:deletethis.net,2008:tagscheme">
MSFT
|
Yahoo Media RSS Module category
media:category
xmlns:media="http://search.yahoo.com/mrss/"
|
-
category/text()
-
Required category name.
-
category/@domain
-
Optional string id'ing the categorization scheme.
|
scheme="http://dmoz.org"
label="Ace Ventura - Pet Detective">
Arts/Movies/Titles/A/Ace_Ventura_Series/Ace_Ventura_-_Pet_Detective
|
Dublin Core subject
dc:subject
xmlns:dc="http://purl.org/dc/elements/1.1/"
|
-
subject/text()
-
Required category name. Typically, the subject will be represented using keywords, key phrases, or classification codes. Recommended best practice is to use a controlled vocabulary.
|
humor
|
Update 2009-9-14: Added WordPress to the Tag Markup table and namespaces to the Tag Markup Scheme table.
feed media delicious technical atom youtube yahoo rss tag 2007 Nov 15, 4:12Tim Spalding founder of LibraryThing gives a talk to the Library of Congress folks about his website LibraryThing. Focus on tagging vs taxonomy. Some humorous things in the talk as well.
library-of-congress library librarything books tagging video ontology tim-spalding taxonomy 2007 Aug 15, 3:16Reasons why del.icio.us style tagging is different and better than things that have come before it.
article blog business taxonomy tagging delicious folksonomy reference tag ontology 2007 Jul 26, 12:05A debate between David Weinberger (of Everything is Miscellaneous) and Andrew Keen (of Cult of the Amatuer) on the Web as the end of intelligent society. Of course since I'm posting this on delicious
its clear who I favor in this debate.
david-weinberger blog article debate taxonomy tagging social community web 2007 Jun 5, 3:09Database of very small objects found in basements, under decks, in couch, etc. The objects are added to the database with dimensions, photo, and name given by fun naming system. Database as art.
art humor taxonomy database community language ontology classification 2007 Jun 4, 4:39David Weinberger (of Everything is Miscellaneous) gives talk about how the Internet has or will change storage and structure of information in a Google Tech Talk.
google video taxonomy david-weinberger
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