March 2003
Intermediate to advanced
224 pages
6h 27m
English
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Name
mod_taxonomy
Synopsis
mod_taxonomy
allows
the classification of objects under a defined taxonomic scheme
— basically, you describe the topics of your objects.
The object can be anything: a channel, an
item, or a reference from another module. Because
of this universality, mod_taxonomy can be used
heavily throughout an RSS 1.0 feed, which may cause some confusion.
As with many modules, a good bit of reformatting may help clarify
things.
The taxonomic definitions are always given as URIs. As shown in Chapter 5, URIs are used, like namespaces, to differentiate between homonyms. Python (the language) and Python (the snake) need to be distinguished, because you may want to run away from one of them.
One good source of taxonomic URIs is the Open Directory Project, at http://www.dmoz.org. All the examples in this section originate from this source.
Namespace
mod_taxonomy
takes the stylish moniker of
taxo: and the identifying URI of
http://purl.org/rss/1.0/modules/taxonomy/. Hence,
the lovely root element:
<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
xmlns="http://purl.org/rss/1.0/"
xmlns:taxo="http://purl.org/rss/1.0/modules/taxonomy/"
>Elements
mod_taxonomy can be used in two ways: the simple
and the more defined. The simple method uses one element, and it can
be used as a subelement of
item
or
channel:
<taxo:topics> <rdf:Bag> <rdf:li resource="URI TO TAXONOMIC REFERENCE" / <rdf:li resource="URI TO TAXONOMIC REFERENCE" /> </rdf:Bag> </taxo:topics>
This nesting ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.