Unfortunately, there's no book about Semantic MediaWiki, but it would be nice if there were, or at least some sort of online, printable, sequential manual... I feel like we're just now reaching the point where the whole system is stable enough that you could publish such a thing without it becoming out-of-date in two months.


On Thu, Jul 23, 2009 at 2:51 PM, Scott Reed <sreed@avacoda.com> wrote:
Thanks, Patrick. While I was hoping for a simpler syntax for getting a property value without a fullblown query, but #vardefine and #var is a useful addition to my toolkit. I see I need to review the extensions.

Can anyone recommend a book on these technologies, especially one including Semantic MediaWiki?

Patrick Nagel [7/22/2009 11:50 PM] wrote:
Hi Scott,

On 2009-07-23 11:06, Scott Reed wrote:
> Jut starting out with this technology, the only way I have figured out 
> to get the value of a property in the current page is 
> {{#show:{{PAGENAME}}| ?propertyname}}. This seems fairly baroque. Is 
> there simpler way?

I don't think there is a simpler way. You will have to get used to all the
curly brackets when using SMW - or MediaWiki in general ;)

You can make use of the VariablesExtension [1] and store the query (or its
result? I'd like to know which one, but in the end it doesn't really matter) in
a variable, which is helpful when you need the same query multiple times within
a page. It looks like this:

{{ #vardefine: some_variable_name | {{#show:{{PAGENAME}}| ?propertyname}} }}
(silent) or
{{ #vardefineecho: some_variable_name | {{#show:{{PAGENAME}}| ?propertyname}}
}} (with output)

Further down in the page you can write

{{ #var: some_variable_name }}

I found this to be very helpful in complex "output templates", helps to avoid a
lot of "code" duplication.


[1]: http://www.mediawiki.org/wiki/Extension:VariablesExtension



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