diff --git a/classes/plugins/PubObjectsExportPlugin.php b/classes/plugins/PubObjectsExportPlugin.php
index d09e2fa98a..37d50d7dc5 100644
--- a/classes/plugins/PubObjectsExportPlugin.php
+++ b/classes/plugins/PubObjectsExportPlugin.php
@@ -43,23 +43,20 @@
 use PKP\submission\PKPSubmission;
 use PKP\user\User;
 
-// The statuses.
-define('EXPORT_STATUS_ANY', '');
-define('EXPORT_STATUS_NOT_DEPOSITED', 'notDeposited');
-define('EXPORT_STATUS_MARKEDREGISTERED', 'markedRegistered');
-define('EXPORT_STATUS_REGISTERED', 'registered');
-
-// The actions.
-define('EXPORT_ACTION_EXPORT', 'export');
-define('EXPORT_ACTION_MARKREGISTERED', 'markRegistered');
-define('EXPORT_ACTION_DEPOSIT', 'deposit');
-
-// Configuration errors.
-define('EXPORT_CONFIG_ERROR_SETTINGS', 0x02);
-
 abstract class PubObjectsExportPlugin extends ImportExportPlugin
 {
-    /** @var PubObjectCache */
+    // The statuses
+    public const EXPORT_STATUS_ANY = '';
+    public const EXPORT_STATUS_NOT_DEPOSITED = 'notDeposited';
+    public const EXPORT_STATUS_MARKEDREGISTERED = 'markedRegistered';
+    public const EXPORT_STATUS_REGISTERED = 'registered';
+    // The actions
+    public const EXPORT_ACTION_EXPORT = 'export';
+    public const EXPORT_ACTION_MARKREGISTERED = 'markRegistered';
+    public const EXPORT_ACTION_DEPOSIT = 'deposit';
+    // Configuration errors.
+    public const EXPORT_CONFIG_ERROR_SETTINGS = 2;    /** @var PubObjectCache */
+
     public $_cache;
 
     /**
@@ -354,10 +351,10 @@ public function getRepresentationFilter()
     public function getStatusNames()
     {
         return [
-            EXPORT_STATUS_ANY => __('plugins.importexport.common.status.any'),
-            EXPORT_STATUS_NOT_DEPOSITED => __('plugins.importexport.common.status.notDeposited'),
-            EXPORT_STATUS_MARKEDREGISTERED => __('plugins.importexport.common.status.markedRegistered'),
-            EXPORT_STATUS_REGISTERED => __('plugins.importexport.common.status.registered'),
+            PubObjectsExportPlugin::EXPORT_STATUS_ANY => __('plugins.importexport.common.status.any'),
+            PubObjectsExportPlugin::EXPORT_STATUS_NOT_DEPOSITED => __('plugins.importexport.common.status.notDeposited'),
+            PubObjectsExportPlugin::EXPORT_STATUS_MARKEDREGISTERED => __('plugins.importexport.common.status.markedRegistered'),
+            PubObjectsExportPlugin::EXPORT_STATUS_REGISTERED => __('plugins.importexport.common.status.registered'),
         ];
     }
 
@@ -458,7 +455,7 @@ public function exportXML($objects, $filter, $context, $noValidation = null, &$o
     public function markRegistered($context, $objects)
     {
         foreach ($objects as $object) {
-            $object->setData($this->getDepositStatusSettingName(), EXPORT_STATUS_MARKEDREGISTERED);
+            $object->setData($this->getDepositStatusSettingName(), PubObjectsExportPlugin::EXPORT_STATUS_MARKEDREGISTERED);
             $this->updateObject($object);
         }
     }
@@ -567,7 +564,7 @@ public function getUnregisteredPreprints($context)
             null,
             null,
             $this->getDepositStatusSettingName(),
-            EXPORT_STATUS_NOT_DEPOSITED,
+            PubObjectsExportPlugin::EXPORT_STATUS_NOT_DEPOSITED,
             null
         );
         return $preprints->toArray();
@@ -856,4 +853,17 @@ protected function _checkForExportAction(string $exportAction): bool
 
 if (!PKP_STRICT_MODE) {
     class_alias('\APP\plugins\PubObjectsExportPlugin', '\PubObjectExportsPlugin');
+
+    foreach ([
+        'EXPORT_STATUS_ANY',
+        'EXPORT_STATUS_NOT_DEPOSITED',
+        'EXPORT_STATUS_MARKEDREGISTERED',
+        'EXPORT_STATUS_REGISTERED',
+        'EXPORT_ACTION_EXPORT',
+        'EXPORT_ACTION_MARKREGISTERED',
+        'EXPORT_ACTION_DEPOSIT',
+        'EXPORT_CONFIG_ERROR_SETTINGS',
+    ] as $constantName) {
+        define($constantName, constant('\PubObjectsExportPlugin::' . $constantName));
+    }
 }
diff --git a/classes/submission/DAO.php b/classes/submission/DAO.php
index d86ff29b57..88d79fc2ca 100644
--- a/classes/submission/DAO.php
+++ b/classes/submission/DAO.php
@@ -13,6 +13,7 @@
 
 namespace APP\submission;
 
+use APP\plugins\PubObjectsExportPlugin;
 use PKP\db\DAOResultFactory;
 use PKP\db\DBResultRange;
 use PKP\identity\Identity;
@@ -72,7 +73,7 @@ public function getExportable(
         if ($issueId) {
             $params[] = $issueId;
         }
-        if ($pubIdSettingName && $pubIdSettingValue && $pubIdSettingValue != EXPORT_STATUS_NOT_DEPOSITED) {
+        if ($pubIdSettingName && $pubIdSettingValue && $pubIdSettingValue != PubObjectsExportPlugin::EXPORT_STATUS_NOT_DEPOSITED) {
             $params[] = $pubIdSettingValue;
         }
 
@@ -92,8 +93,8 @@ public function getExportable(
             . ($pubIdType != null ? ' AND pspidt.setting_name = ? AND pspidt.setting_value IS NOT NULL' : '')
             . ($title != null ? ' AND (pst.setting_name = ? AND pst.setting_value LIKE ?)' : '')
             . ($author != null ? ' AND (asgs.setting_value LIKE ? OR asfs.setting_value LIKE ?)' : '')
-            . (($pubIdSettingName != null && $pubIdSettingValue != null && $pubIdSettingValue == EXPORT_STATUS_NOT_DEPOSITED) ? ' AND pss.setting_value IS NULL' : '')
-            . (($pubIdSettingName != null && $pubIdSettingValue != null && $pubIdSettingValue != EXPORT_STATUS_NOT_DEPOSITED) ? ' AND pss.setting_value = ?' : '')
+            . (($pubIdSettingName != null && $pubIdSettingValue != null && $pubIdSettingValue == PubObjectsExportPlugin::EXPORT_STATUS_NOT_DEPOSITED) ? ' AND pss.setting_value IS NULL' : '')
+            . (($pubIdSettingName != null && $pubIdSettingValue != null && $pubIdSettingValue != PubObjectsExportPlugin::EXPORT_STATUS_NOT_DEPOSITED) ? ' AND pss.setting_value = ?' : '')
             . (($pubIdSettingName != null && is_null($pubIdSettingValue)) ? ' AND (pss.setting_value IS NULL OR pss.setting_value = \'\')' : '');
 
         $rows = $this->deprecatedDao->retrieveRange(
diff --git a/controllers/grid/pubIds/PubIdExportRepresentationsListGridCellProvider.php b/controllers/grid/pubIds/PubIdExportRepresentationsListGridCellProvider.php
index 5dcd5cf581..ecd955f7d4 100644
--- a/controllers/grid/pubIds/PubIdExportRepresentationsListGridCellProvider.php
+++ b/controllers/grid/pubIds/PubIdExportRepresentationsListGridCellProvider.php
@@ -17,6 +17,7 @@
 namespace APP\controllers\grid\pubIds;
 
 use APP\facades\Repo;
+use APP\plugins\PubObjectsExportPlugin;
 use PKP\controllers\grid\DataObjectGridCellProvider;
 use PKP\controllers\grid\GridHandler;
 use PKP\linkAction\LinkAction;
@@ -134,7 +135,7 @@ public function getTemplateVarsFromRowColumn($row, $column)
                         $label = $statusNames[$status];
                     }
                 } else {
-                    $label = $statusNames[EXPORT_STATUS_NOT_DEPOSITED];
+                    $label = $statusNames[PubObjectsExportPlugin::EXPORT_STATUS_NOT_DEPOSITED];
                 }
                 return ['label' => $label];
         }
diff --git a/controllers/grid/pubIds/PubIdExportRepresentationsListGridHandler.php b/controllers/grid/pubIds/PubIdExportRepresentationsListGridHandler.php
index cf029b7c1a..4856409626 100644
--- a/controllers/grid/pubIds/PubIdExportRepresentationsListGridHandler.php
+++ b/controllers/grid/pubIds/PubIdExportRepresentationsListGridHandler.php
@@ -285,7 +285,7 @@ protected function getFilterValues($filter)
         } else {
             $column = null;
         }
-        if (isset($filter['statusId']) && $filter['statusId'] != EXPORT_STATUS_ANY) {
+        if (isset($filter['statusId']) && $filter['statusId'] != PubObjectsExportPlugin::EXPORT_STATUS_ANY) {
             $statusId = $filter['statusId'];
         } else {
             $statusId = null;
diff --git a/controllers/grid/submissions/ExportPublishedSubmissionsListGridCellProvider.php b/controllers/grid/submissions/ExportPublishedSubmissionsListGridCellProvider.php
index ada73275e4..2fded81e25 100644
--- a/controllers/grid/submissions/ExportPublishedSubmissionsListGridCellProvider.php
+++ b/controllers/grid/submissions/ExportPublishedSubmissionsListGridCellProvider.php
@@ -17,6 +17,7 @@
 namespace APP\controllers\grid\submissions;
 
 use APP\facades\Repo;
+use APP\plugins\PubObjectsExportPlugin;
 use PKP\controllers\grid\DataObjectGridCellProvider;
 use PKP\controllers\grid\GridHandler;
 use PKP\linkAction\LinkAction;
@@ -119,7 +120,7 @@ public function getTemplateVarsFromRowColumn($row, $column)
                         $label = $statusNames[$status];
                     }
                 } else {
-                    $label = $statusNames[EXPORT_STATUS_NOT_DEPOSITED];
+                    $label = $statusNames[PubObjectsExportPlugin::EXPORT_STATUS_NOT_DEPOSITED];
                 }
                 return ['label' => $label];
         }
diff --git a/controllers/grid/submissions/ExportPublishedSubmissionsListGridHandler.php b/controllers/grid/submissions/ExportPublishedSubmissionsListGridHandler.php
index 8d927de919..0c0a5d29c3 100644
--- a/controllers/grid/submissions/ExportPublishedSubmissionsListGridHandler.php
+++ b/controllers/grid/submissions/ExportPublishedSubmissionsListGridHandler.php
@@ -18,6 +18,7 @@
 
 use APP\core\Application;
 use APP\facades\Repo;
+use APP\plugins\PubObjectsExportPlugin;
 use PKP\controllers\grid\feature\PagingFeature;
 use PKP\controllers\grid\feature\selectableItems\SelectableItemsFeature;
 use PKP\controllers\grid\GridColumn;
@@ -262,7 +263,7 @@ protected function getFilterValues($filter)
         } else {
             $column = null;
         }
-        if (isset($filter['statusId']) && $filter['statusId'] != EXPORT_STATUS_ANY) {
+        if (isset($filter['statusId']) && $filter['statusId'] != PubObjectsExportPlugin::EXPORT_STATUS_ANY) {
             $statusId = $filter['statusId'];
         } else {
             $statusId = null;