diff -r 8e5fcebb9018 -r af85c436048f server/src/app/Libraries/Mappers/CocoonTextRdfMapper.php
--- a/server/src/app/Libraries/Mappers/CocoonTextRdfMapper.php	Wed Jan 20 09:56:36 2016 +0100
+++ b/server/src/app/Libraries/Mappers/CocoonTextRdfMapper.php	Wed Jan 20 16:21:40 2016 +0100
@@ -150,7 +150,7 @@
 
         // build others
         foreach($res->all($this->inputGraph->resource('http://purl.org/dc/terms/isFormatOf')) as $reprUrl) {
-            $webResource = $outputGraph->resource($reprUrl, 'edm:WebResources');
+            $webResource = $outputGraph->resource($reprUrl, 'edm:WebResource');
             $mimetype = Utils::getMimetype($reprUrl);
 
             $webResource->addLiteral('http://purl.org/dc/elements/1.1/format', Literal::create($mimetype, null, $outputGraph->resource('http://purl.org/dc/terms/IMT')));