diff --git a/dnet-app/libs/dnet-common-mapping/src/main/java/eu/dnetlib/common/mapping/xslt/XsltTransformerFactory.java b/dnet-app/libs/dnet-common-mapping/src/main/java/eu/dnetlib/common/mapping/xslt/XsltTransformerFactory.java
index b6037e3..d394637 100644
--- a/dnet-app/libs/dnet-common-mapping/src/main/java/eu/dnetlib/common/mapping/xslt/XsltTransformerFactory.java
+++ b/dnet-app/libs/dnet-common-mapping/src/main/java/eu/dnetlib/common/mapping/xslt/XsltTransformerFactory.java
@@ -14,6 +14,7 @@ import eu.dnetlib.common.clients.DnetServiceClientFactory;
 import eu.dnetlib.common.clients.SimpleResourceClient;
 import eu.dnetlib.common.clients.VocabularyClient;
 import eu.dnetlib.common.mapping.RecordTransformer;
+import eu.dnetlib.common.mapping.xslt.functions.CalculateMd5;
 import eu.dnetlib.common.mapping.xslt.functions.XsltDateCleaner;
 import eu.dnetlib.common.mapping.xslt.functions.XsltPersonCleaner;
 import eu.dnetlib.common.mapping.xslt.functions.XsltVocabularyCleaner;
@@ -49,6 +50,7 @@ public class XsltTransformerFactory {
 
 	public RecordTransformer<String, String> getTransformerByXSLT(final String xsltText, final Map<String, Object> params) throws TransformationException {
 		final Processor processor = new Processor(false);
+		processor.registerExtensionFunction(new CalculateMd5());
 		processor.registerExtensionFunction(new XsltDateCleaner());
 		processor.registerExtensionFunction(new XsltPersonCleaner());
 		processor.registerExtensionFunction(new XsltVocabularyCleaner(this.clientFactory.getClient(VocabularyClient.class)));
diff --git a/dnet-app/libs/dnet-common-mapping/src/main/java/eu/dnetlib/common/mapping/xslt/functions/CalculateMd5.java b/dnet-app/libs/dnet-common-mapping/src/main/java/eu/dnetlib/common/mapping/xslt/functions/CalculateMd5.java
new file mode 100644
index 0000000..9e528d5
--- /dev/null
+++ b/dnet-app/libs/dnet-common-mapping/src/main/java/eu/dnetlib/common/mapping/xslt/functions/CalculateMd5.java
@@ -0,0 +1,40 @@
+package eu.dnetlib.common.mapping.xslt.functions;
+
+import org.apache.commons.codec.digest.DigestUtils;
+import org.apache.commons.lang3.StringUtils;
+
+import eu.dnetlib.common.mapping.xslt.XsltTransformerFactory;
+import net.sf.saxon.s9api.ExtensionFunction;
+import net.sf.saxon.s9api.ItemType;
+import net.sf.saxon.s9api.OccurrenceIndicator;
+import net.sf.saxon.s9api.QName;
+import net.sf.saxon.s9api.SaxonApiException;
+import net.sf.saxon.s9api.SequenceType;
+import net.sf.saxon.s9api.XdmAtomicValue;
+import net.sf.saxon.s9api.XdmValue;
+
+public class CalculateMd5 implements ExtensionFunction {
+
+	@Override
+	public QName getName() {
+		return new QName(XsltTransformerFactory.QNAME_BASE_URI + "/common", "md5");
+	}
+
+	@Override
+	public SequenceType getResultType() {
+		return SequenceType.makeSequenceType(ItemType.STRING, OccurrenceIndicator.ZERO_OR_ONE);
+	}
+
+	@Override
+	public SequenceType[] getArgumentTypes() {
+		return new SequenceType[] { SequenceType.makeSequenceType(ItemType.STRING, OccurrenceIndicator.ZERO_OR_ONE) };
+	}
+
+	@Override
+	public XdmValue call(final XdmValue[] xdmValues) throws SaxonApiException {
+		final XdmValue r = xdmValues[0];
+		if (r.size() == 0) { return new XdmAtomicValue(""); }
+		final String currentValue = xdmValues[0].itemAt(0).getStringValue();
+		return new XdmAtomicValue(StringUtils.isNotBlank(currentValue) ? DigestUtils.md5Hex(currentValue) : null);
+	}
+}
diff --git a/dnet-app/libs/dnet-common-mapping/src/main/java/eu/dnetlib/common/mapping/xslt/functions/XsltDateCleaner.java b/dnet-app/libs/dnet-common-mapping/src/main/java/eu/dnetlib/common/mapping/xslt/functions/XsltDateCleaner.java
index 32ee830..d6d44e7 100644
--- a/dnet-app/libs/dnet-common-mapping/src/main/java/eu/dnetlib/common/mapping/xslt/functions/XsltDateCleaner.java
+++ b/dnet-app/libs/dnet-common-mapping/src/main/java/eu/dnetlib/common/mapping/xslt/functions/XsltDateCleaner.java
@@ -27,7 +27,7 @@ public class XsltDateCleaner implements ExtensionFunction {
 
 	@Override
 	public QName getName() {
-		return new QName(XsltTransformerFactory.QNAME_BASE_URI + "/dateISO", "dateISO");
+		return new QName(XsltTransformerFactory.QNAME_BASE_URI + "/dates", "dateISO");
 	}
 
 	@Override
diff --git a/dnet-app/libs/dnet-common-mapping/src/main/java/eu/dnetlib/common/mapping/xslt/functions/XsltPersonCleaner.java b/dnet-app/libs/dnet-common-mapping/src/main/java/eu/dnetlib/common/mapping/xslt/functions/XsltPersonCleaner.java
index 909412a..06f98cf 100644
--- a/dnet-app/libs/dnet-common-mapping/src/main/java/eu/dnetlib/common/mapping/xslt/functions/XsltPersonCleaner.java
+++ b/dnet-app/libs/dnet-common-mapping/src/main/java/eu/dnetlib/common/mapping/xslt/functions/XsltPersonCleaner.java
@@ -24,7 +24,7 @@ public class XsltPersonCleaner implements ExtensionFunction {
 
 	@Override
 	public QName getName() {
-		return new QName(XsltTransformerFactory.QNAME_BASE_URI + "/person", "normalize");
+		return new QName(XsltTransformerFactory.QNAME_BASE_URI + "/persons", "normalize");
 	}
 
 	@Override
diff --git a/dnet-app/libs/dnet-common-mapping/src/main/java/eu/dnetlib/common/mapping/xslt/functions/XsltVocabularyCleaner.java b/dnet-app/libs/dnet-common-mapping/src/main/java/eu/dnetlib/common/mapping/xslt/functions/XsltVocabularyCleaner.java
index ba35856..839f54b 100644
--- a/dnet-app/libs/dnet-common-mapping/src/main/java/eu/dnetlib/common/mapping/xslt/functions/XsltVocabularyCleaner.java
+++ b/dnet-app/libs/dnet-common-mapping/src/main/java/eu/dnetlib/common/mapping/xslt/functions/XsltVocabularyCleaner.java
@@ -37,7 +37,7 @@ public class XsltVocabularyCleaner implements ExtensionFunction {
 
 	@Override
 	public QName getName() {
-		return new QName(XsltTransformerFactory.QNAME_BASE_URI + "/clean", "clean");
+		return new QName(XsltTransformerFactory.QNAME_BASE_URI + "/vocs", "clean");
 	}
 
 	@Override