Say you have two custom taxnomies defined: genre and artist.
Currently, you can do the following types of queries on your site:
?genre=jazz
?genre=jazz&cat=1
But you can’t do this:
?genre=jazz&artist=Chet+Baker
WordPress will just ignore one of the parameters.
This plugin fixes that.
Ed says: With this plugin, could I do ?genre=jazz,rock ? I want to list posts belonging to multiple meta_values within the same meta_key. I went as far as trying to patch wp-includes/query.php with http://core.trac.wordpress.org/ticket/9124 , to no avail.
You’re confusing this plugin with Custom Field Taxonomies.
With this plugin, you could do ?genre=jazz,rock if you have a custom taxonomy ‘genre’, using the Simple Taxonomies plugin, for example. It would match posts that have the term jazz or rock.
[...] Para conseguir que las búsquedas filtren por taxonomías y por categorías, viene bien este plugin: http://scribu.net/wordpress/query-multiple-taxonomies/qmt-1-0.html. [...]