public static function taxonomy( $condition = array() ) {

		$target = explode( '_', $condition['target'] );

		// Remove the tax_ prefix.
		array_shift( $target );

		// Assign the last key as the modifier _all, _selected
		$modifier = array_pop( $target );

		// Whatever is left is the taxonomy.
		$taxonomy = implode( '_', $target );

		if ( $taxonomy == 'category' ) {
			return self::category( $condition );
		} elseif ( $taxonomy == 'post_tag' ) {
			return self::post_tag( $condition );
		}

		switch ( $modifier ) {
			case 'all':
				if ( is_tax( $taxonomy ) ) {
					return true;
				}
				break;

			case 'ID':
			case 'selected':
				$selected = ! empty( $condition['settings']['selected'] ) ? $condition['settings']['selected'] : array();

				if ( is_tax( $taxonomy, wp_parse_id_list( $selected ) ) ) {
					return true;
				}
				break;
		}

		return false;
	}