diff --git a/DataMinerAlgorithmsCrawler/src/main/resources/org/gcube/data/publishing/gCatFeeder/collectors/dm/profile.xml b/DataMinerAlgorithmsCrawler/src/main/resources/org/gcube/data/publishing/gCatFeeder/collectors/dm/profile.xml
index 8ef085e..44f5665 100644
--- a/DataMinerAlgorithmsCrawler/src/main/resources/org/gcube/data/publishing/gCatFeeder/collectors/dm/profile.xml
+++ b/DataMinerAlgorithmsCrawler/src/main/resources/org/gcube/data/publishing/gCatFeeder/collectors/dm/profile.xml
@@ -1,18 +1,18 @@
 <metadataformat type="DataMiner Process">
-	<metadatafield>
+	<metadatafield categoryref="DataMiner Process">
 		<fieldName>Input Parameter</fieldName>
 		<mandatory>false</mandatory>
 		<dataType>String</dataType>
 		<note>Input parameter expected for the execution of the process</note>
 	</metadatafield>	
-	<metadatafield>
+	<metadatafield categoryref="DataMiner Process">
 		<fieldName>Output Parameter</fieldName>
 		<mandatory>false</mandatory>
 		<dataType>String</dataType>
 		<note>Output parameter expected from the execution of the process
 		</note>
 	</metadatafield>
-	<metadatafield>
+	<metadatafield categoryref="DataMiner Process">
 		<fieldName>Process Author</fieldName>
 		<mandatory>false</mandatory>
 		<dataType>String</dataType>
@@ -27,7 +27,7 @@
 				]*(orcid.org\/0000-000(1-[5-9]|2-[0-9]|3-[0-4])\d\d\d-\d\d\d[\dX])?$</regularExpression>
 		</validator>
 	</metadatafield>
-	<metadatafield>
+	<metadatafield categoryref="DataMiner Process">
 		<fieldName>Process Maintainer</fieldName>
 		<mandatory>false</mandatory>
 		<dataType>String</dataType>