=== modified file 'dhis-2/dhis-web/dhis-web-api/src/main/java/org/hisp/dhis/api/controller/DataValueController.java'
--- dhis-2/dhis-web/dhis-web-api/src/main/java/org/hisp/dhis/api/controller/DataValueController.java	2014-02-03 11:42:39 +0000
+++ dhis-2/dhis-web/dhis-web-api/src/main/java/org/hisp/dhis/api/controller/DataValueController.java	2014-02-11 15:34:53 +0000
@@ -234,4 +234,99 @@
             dataValueService.updateDataValue( dataValue );
         }
     }
+    
+    @PreAuthorize( "hasRole('ALL') or hasRole('F_DATAVALUE_DELETE')" )
+    @RequestMapping( method = RequestMethod.DELETE, produces = "text/plain" )
+    public void deleteDataValue( 
+        @RequestParam String de, 
+        @RequestParam( required = false ) String co, 
+        @RequestParam( required = false ) String cc, 
+        @RequestParam( required = false ) String cp, 
+        @RequestParam String pe, 
+        @RequestParam String ou, HttpServletResponse response )
+    {
+        // ---------------------------------------------------------------------
+        // Input validation
+        // ---------------------------------------------------------------------
+        
+        DataElement dataElement = dataElementService.getDataElement( de );
+
+        if ( dataElement == null )
+        {
+            ContextUtils.conflictResponse( response, "Illegal data element identifier: " + de );
+            return;
+        }
+
+        DataElementCategoryOptionCombo categoryOptionCombo = null;
+
+        if ( co != null )
+        {
+            categoryOptionCombo = categoryService.getDataElementCategoryOptionCombo( co );
+        }
+        else
+        {
+            categoryOptionCombo = categoryService.getDefaultDataElementCategoryOptionCombo();
+        }
+
+        if ( categoryOptionCombo == null )
+        {
+            ContextUtils.conflictResponse( response, "Illegal category option combo identifier: " + co );
+            return;
+        }
+
+        DataElementCategoryOptionCombo attributeOptionCombo = inputUtils.getAttributeOptionCombo( response, cc, cp );
+        
+        if ( attributeOptionCombo == null )
+        {
+            return;
+        }
+        
+        Period period = PeriodType.getPeriodFromIsoString( pe );
+
+        if ( period == null )
+        {
+            ContextUtils.conflictResponse( response, "Illegal period identifier: " + pe );
+            return;
+        }
+
+        OrganisationUnit organisationUnit = organisationUnitService.getOrganisationUnit( ou );
+
+        if ( organisationUnit == null )
+        {
+            ContextUtils.conflictResponse( response, "Illegal organisation unit identifier: " + ou );
+            return;
+        }
+        
+        boolean isInHierarchy = organisationUnitService.isInUserHierarchy( organisationUnit );
+        
+        if ( !isInHierarchy )
+        {
+            ContextUtils.conflictResponse( response, "Organisation unit is not in the hierarchy of the current user: " + ou );
+            return;
+        }
+
+        // ---------------------------------------------------------------------
+        // Locking validation
+        // ---------------------------------------------------------------------
+
+        if ( dataSetService.isLocked( dataElement, period, organisationUnit, null ) )
+        {
+            ContextUtils.conflictResponse( response, "Data set is locked" );
+            return;
+        }
+
+        // ---------------------------------------------------------------------
+        // Delete data value
+        // ---------------------------------------------------------------------
+
+        DataValue dataValue = dataValueService.getDataValue( dataElement, period, organisationUnit, categoryOptionCombo, attributeOptionCombo );
+
+        if ( dataValue == null )
+        {
+            ContextUtils.conflictResponse( response, "Data value cannot be deleted because it does not exist" );
+            return;
+        }
+        
+        dataValueService.deleteDataValue( dataValue );
+    }
 }

=== modified file 'dhis-2/dhis-web/dhis-web-dataentry/src/main/resources/struts.xml'
--- dhis-2/dhis-web/dhis-web-dataentry/src/main/resources/struts.xml	2014-01-23 09:31:23 +0000
+++ dhis-2/dhis-web/dhis-web-dataentry/src/main/resources/struts.xml	2014-02-11 15:34:53 +0000
@@ -37,6 +37,10 @@
       <param name="requiredAuthorities">F_DATAVALUE_ADD</param>
     </action>
 
+    <action name="deleteValue" class="org.hisp.dhis.commons.action.NoAction">
+      <param name="requiredAuthorities">F_DATAVALUE_DELETE</param>
+    </action>
+
     <action name="saveMinMaxLimits" class="org.hisp.dhis.de.action.SaveMinMaxLimitsAction">
       <result name="success" type="velocity-json">/dhis-web-dataentry/status.vm</result>
       <param name="onExceptionReturn">plainTextError</param>

=== modified file 'dhis-2/dhis-web/dhis-web-dataentry/src/main/webapp/dhis-web-dataentry/javascript/entry.js'
--- dhis-2/dhis-web/dhis-web-dataentry/src/main/webapp/dhis-web-dataentry/javascript/entry.js	2014-01-23 15:36:54 +0000
+++ dhis-2/dhis-web/dhis-web-dataentry/src/main/webapp/dhis-web-dataentry/javascript/entry.js	2014-02-11 15:34:53 +0000
@@ -309,11 +309,12 @@
             url: '../api/dataValues',
             data: dataValue,
             dataType: 'json',
+            type: 'post',
             success: handleSuccess,
             error: handleError
         } );
     };
-
+    
     function handleSuccess()
     {
     	dhis2.de.storageManager.clearDataValueJSON( dataValue );

=== modified file 'dhis-2/dhis-web/dhis-web-dataentry/src/main/webapp/dhis-web-dataentry/javascript/form.js'
--- dhis-2/dhis-web/dhis-web-dataentry/src/main/webapp/dhis-web-dataentry/javascript/form.js	2014-01-24 15:20:17 +0000
+++ dhis-2/dhis-web/dhis-web-dataentry/src/main/webapp/dhis-web-dataentry/javascript/form.js	2014-02-11 15:34:53 +0000
@@ -344,6 +344,7 @@
             url: '../api/dataValues',
             data: value,
             dataType: 'json',
+            type: 'post',
             success: function( data, textStatus, xhr )
             {
             	dhis2.de.storageManager.clearDataValueJSON( value );