sort.diff

diff --git a/i18n/en.json b/i18n/en.json
index 63ca958..942352a 100644
--- a/i18n/en.json
+++ b/i18n/en.json
@@ -105,6 +105,7 @@
 	"gather-overlay-edit-button": "Edit title and description",
 	"gather-overlay-continue": "Next",
 	"right-gather-hidelist": "Force a public user list to become hidden",
+	"gather-api-help-param-sortby": "Specify the sorting mechanism to use on collection.",
 	"apihelp-gather-description": "List and edit Gather collections.",
 	"apihelp-gather-param-gather": "Action to perform on collections.",
 	"apihelp-gather-param-owner": "Owner of the collections to search for. If omitted, defaults to current user.",
diff --git a/i18n/qqq.json b/i18n/qqq.json
index 1411a02..2cfc74e 100644
--- a/i18n/qqq.json
+++ b/i18n/qqq.json
@@ -107,6 +107,7 @@
 	"gather-overlay-edit-button": "Label for button that enables editing of description and name of a collection.",
 	"gather-overlay-continue": "Label for button inside overlay to take you to another screen.",
 	"right-gather-hidelist": "With gather, users can create lists and make them public. This right gives admins a way to hide or restore a list that violates WP policy.\n\n{{Doc-right|gather-hidelist}}",
+	"gather-api-help-param-sortby": "Specify the sorting mechanism to use on collection.",
 	"apihelp-gather-description": "{{doc-apihelp-description|gather}}",
 	"apihelp-gather-param-gather": "{{doc-apihelp-param|gather|gather}}",
 	"apihelp-gather-param-owner": "{{doc-apihelp-param|gather|owner}}",
diff --git a/includes/api/ApiQueryListPages.php b/includes/api/ApiQueryListPages.php
index 15ce75e..49f2f37 100644
--- a/includes/api/ApiQueryListPages.php
+++ b/includes/api/ApiQueryListPages.php
@@ -134,20 +134,26 @@ class ApiQueryListPages extends ApiQueryGeneratorBase {
 		$this->addFields( array( 'gli_namespace', 'gli_title', 'gli_order' ) );
 		$this->addWhereFld( 'gli_gl_id', $params['id'] );
 		$this->addWhereFld( 'gli_namespace', $params['namespace'] );
+		switch( $params['sortby'] ) {
+			case 'namespace':
+				$sortField = 'gli_namespace';
+				break;
+			default:
+				$sortField = 'gli_order';
+		}
 
 		if ( isset( $params['continue'] ) ) {
 			$cont = $params['continue'];
 			$this->dieContinueUsageIf( strval( floatval( $cont ) ) !== $cont );
 			$cont = $this->getDB()->addQuotes( $cont );
 			$op = $params['dir'] == 'ascending' ? '>=' : '<=';
-			$this->addWhere( "gli_order $op $cont" );
+			$this->addWhere( "$sortField $op $cont" );
 		}
 		$sort = ( $params['dir'] == 'descending' ? ' DESC' : '' );
-		$this->addOption( 'ORDER BY', 'gli_order' . $sort );
+		$this->addOption( 'ORDER BY', $sortField . $sort );
 
 		$this->addOption( 'LIMIT', $params['limit'] + 1 );
 		$res = $this->select( __METHOD__ );
-
 		$titles = array();
 		$count = 0;
 		foreach ( $res as $row ) {
@@ -270,6 +276,14 @@ class ApiQueryListPages extends ApiQueryGeneratorBase {
 			'token' => array(
 				ApiBase::PARAM_TYPE => 'string',
 			),
+			'sortby' => array(
+				ApiBase::PARAM_DFLT => 'position',
+				ApiBase::PARAM_TYPE => array(
+					'position',
+					'namespace',
+				),
+				ApiBase::PARAM_HELP_MSG => 'gather-api-help-param-sortby',
+			),
 			'dir' => array(
 				ApiBase::PARAM_DFLT => 'ascending',
 				ApiBase::PARAM_TYPE => array(
diff --git a/includes/models/Collection.php b/includes/models/Collection.php
index b1d5b24..a03eeb2 100644
--- a/includes/models/Collection.php
+++ b/includes/models/Collection.php
@@ -159,6 +159,7 @@ class Collection extends CollectionBase implements IteratorAggregate {
 			'lstprop' => 'label|description|public|image|owner',
 			'prop' => 'pageimages|extracts',
 			'generator' => 'listpages',
+			'glspsortby' => 'namespace',
 			'glspid' => $id,
 			'explaintext' => true,
 			'exintro' => true,