[no bug] sync with older properties file
diff --git a/bundles/org.eclipse.wst.xsd.ui/plugin.properties b/bundles/org.eclipse.wst.xsd.ui/plugin.properties
index 21af0ae..bb3d093 100644
--- a/bundles/org.eclipse.wst.xsd.ui/plugin.properties
+++ b/bundles/org.eclipse.wst.xsd.ui/plugin.properties
@@ -546,6 +546,8 @@
 _UI_GENERATE_DDL_TITLE          = Generate DDL
 _UI_GENERATE_DDL_DESCRIPTION    = Generate DDL from the selected XML schema file.
 
+_UI_XML_SCHEMA_VALIDATOR            = XML Schema Validator
+
 ! Generation from the Schema model - pre-condition check
 _UI_DIALOG_TITLE_GRAMMAR_ERROR      = Invalid Grammar
 _UI_DIALOG_INFO_SCHEMA_INVALID      = The schema file contains errors. Open it in the XML Schema editor and validate it for details.