Using 1 taxonomy for multiple post types?
You can use an array of post types in register_taxonomy() $object_type (array/string) (required) Name of the object type for the taxonomy object. Object-types can be built-in Post Type or any Custom Post Type that may be registered. http://codex.wordpress.org/Function_Reference/register_taxonomy Example: register_taxonomy( ‘artist’, array( ‘profile’, ‘cd’ ), $args );