diff --git a/dhp-workflows/dhp-broker-events/pom.xml b/dhp-workflows/dhp-broker-events/pom.xml
index eddc042c6b..f943ac93aa 100644
--- a/dhp-workflows/dhp-broker-events/pom.xml
+++ b/dhp-workflows/dhp-broker-events/pom.xml
@@ -24,11 +24,7 @@
 			<groupId>org.apache.spark</groupId>
 			<artifactId>spark-sql_2.11</artifactId>
 		</dependency>
-		<dependency>
-			<groupId>org.apache.spark</groupId>
-			<artifactId>spark-hive_2.11</artifactId>
-			<scope>test</scope>
-		</dependency>
+		
 
 		<dependency>
 			<groupId>eu.dnetlib.dhp</groupId>
@@ -45,10 +41,6 @@
 			<artifactId>dnet-pace-core</artifactId>
 		</dependency>
 
-		<dependency>
-			<groupId>com.jayway.jsonpath</groupId>
-			<artifactId>json-path</artifactId>
-		</dependency>
 		<dependency>
 			<groupId>dom4j</groupId>
 			<artifactId>dom4j</artifactId>
@@ -61,7 +53,7 @@
 		<dependency>
 			<groupId>eu.dnetlib</groupId>
 			<artifactId>dnet-openaire-broker-common</artifactId>
-			<version>[3.0.1,4.0.0)</version>
+			<version>[3.0.2,4.0.0)</version>
 		</dependency>
 
 	</dependencies>
diff --git a/dhp-workflows/dhp-broker-events/src/main/java/eu/dnetlib/dhp/broker/oa/GenerateEventsApplication.java b/dhp-workflows/dhp-broker-events/src/main/java/eu/dnetlib/dhp/broker/oa/GenerateEventsApplication.java
index c1f12f43c5..62171ac611 100644
--- a/dhp-workflows/dhp-broker-events/src/main/java/eu/dnetlib/dhp/broker/oa/GenerateEventsApplication.java
+++ b/dhp-workflows/dhp-broker-events/src/main/java/eu/dnetlib/dhp/broker/oa/GenerateEventsApplication.java
@@ -31,12 +31,9 @@ import eu.dnetlib.dhp.broker.oa.util.aggregators.withRels.OpenaireBrokerResultAg
 import eu.dnetlib.dhp.broker.oa.util.aggregators.withRels.RelatedEntityFactory;
 import eu.dnetlib.dhp.broker.oa.util.aggregators.withRels.RelatedProject;
 import eu.dnetlib.dhp.common.HdfsSupport;
-import eu.dnetlib.dhp.schema.oaf.OtherResearchProduct;
 import eu.dnetlib.dhp.schema.oaf.Project;
-import eu.dnetlib.dhp.schema.oaf.Publication;
 import eu.dnetlib.dhp.schema.oaf.Relation;
 import eu.dnetlib.dhp.schema.oaf.Result;
-import eu.dnetlib.dhp.schema.oaf.Software;
 import eu.dnetlib.dhp.utils.ISLookupClientFactory;
 import eu.dnetlib.enabling.is.lookup.rmi.ISLookUpService;
 import eu.dnetlib.pace.config.DedupConfig;
@@ -75,25 +72,38 @@ public class GenerateEventsApplication {
 		log.info("dedupConfigProfileId: {}", dedupConfigProfileId);
 
 		final SparkConf conf = new SparkConf();
-		conf.set("spark.serializer", "org.apache.spark.serializer.KryoSerializer");
-		conf.registerKryoClasses(BrokerConstants.getModelClasses());
+		// conf.set("spark.serializer", "org.apache.spark.serializer.KryoSerializer");
+		// conf.registerKryoClasses(BrokerConstants.getModelClasses());
 
-		final DedupConfig dedupConfig = loadDedupConfig(isLookupUrl, dedupConfigProfileId);
+		// TODO UNCOMMENT
+		// final DedupConfig dedupConfig = loadDedupConfig(isLookupUrl, dedupConfigProfileId);
+		final DedupConfig dedupConfig = null;
 
 		runWithSparkSession(conf, isSparkSessionManaged, spark -> {
 
 			removeOutputDir(spark, eventsPath);
 
-			spark
-				.emptyDataset(Encoders.kryo(Event.class))
-				.union(generateEvents(spark, graphPath, Publication.class, dedupConfig))
-				.union(generateEvents(spark, graphPath, eu.dnetlib.dhp.schema.oaf.Dataset.class, dedupConfig))
-				.union(generateEvents(spark, graphPath, Software.class, dedupConfig))
-				.union(generateEvents(spark, graphPath, OtherResearchProduct.class, dedupConfig))
+			// TODO REMOVE THIS
+			final Dataset<Project> projects = readPath(spark, graphPath + "/project", Project.class);
+			final Dataset<Relation> rels = readPath(spark, graphPath + "/relation", Relation.class)
+				.filter(r -> !r.getRelClass().equals(BrokerConstants.IS_MERGED_IN_CLASS))
+				.cache();
+			relatedEntities(projects, rels, RelatedProject.class)
 				.write()
 				.mode(SaveMode.Overwrite)
-				.option("compression", "gzip")
 				.json(eventsPath);
+
+			// TODO UNCOMMENT THIS
+			// spark
+			// .emptyDataset(Encoders.bean(Event.class))
+			// .union(generateEvents(spark, graphPath, Publication.class, dedupConfig))
+			// .union(generateEvents(spark, graphPath, eu.dnetlib.dhp.schema.oaf.Dataset.class, dedupConfig))
+			// .union(generateEvents(spark, graphPath, Software.class, dedupConfig))
+			// .union(generateEvents(spark, graphPath, OtherResearchProduct.class, dedupConfig))
+			// .write()
+			// .mode(SaveMode.Overwrite)
+			// .option("compression", "gzip")
+			// .json(eventsPath);
 		});
 
 	}
@@ -117,45 +127,48 @@ public class GenerateEventsApplication {
 			.toColumn();
 
 		return results
-			.joinWith(mergedRels, results.col("result.id").equalTo(mergedRels.col("source")), "inner")
+			.joinWith(mergedRels, results.col("openaireId").equalTo(mergedRels.col("source")), "inner")
 			.groupByKey(
 				(MapFunction<Tuple2<OpenaireBrokerResult, Relation>, String>) t -> t._2.getTarget(), Encoders.STRING())
 			.agg(aggr)
-			.map((MapFunction<Tuple2<String, ResultGroup>, ResultGroup>) t -> t._2, Encoders.kryo(ResultGroup.class))
-			.filter(ResultGroup::isValid)
+			.map((MapFunction<Tuple2<String, ResultGroup>, ResultGroup>) t -> t._2, Encoders.bean(ResultGroup.class))
+			.filter(rg -> rg.getData().size() > 1)
 			.map(
 				(MapFunction<ResultGroup, EventGroup>) g -> EventFinder.generateEvents(g, dedupConfig),
-				Encoders.kryo(EventGroup.class))
-			.flatMap(group -> group.getData().iterator(), Encoders.kryo(Event.class));
+				Encoders.bean(EventGroup.class))
+			.flatMap(group -> group.getData().iterator(), Encoders.bean(Event.class));
 	}
 
 	private static <SRC extends Result> Dataset<OpenaireBrokerResult> expandResultsWithRelations(
 		final SparkSession spark,
 		final String graphPath,
 		final Class<SRC> sourceClass) {
+
 		final Dataset<Project> projects = readPath(spark, graphPath + "/project", Project.class);
-		final Dataset<eu.dnetlib.dhp.schema.oaf.Dataset> datasets = readPath(
-			spark, graphPath + "/dataset", eu.dnetlib.dhp.schema.oaf.Dataset.class);
-		final Dataset<Software> softwares = readPath(spark, graphPath + "/software", Software.class);
-		final Dataset<Publication> publications = readPath(spark, graphPath + "/publication", Publication.class);
+		// final Dataset<eu.dnetlib.dhp.schema.oaf.Dataset> datasets = readPath(
+		// spark, graphPath + "/dataset", eu.dnetlib.dhp.schema.oaf.Dataset.class);
+		// final Dataset<Software> softwares = readPath(spark, graphPath + "/software", Software.class);
+		// final Dataset<Publication> publications = readPath(spark, graphPath + "/publication", Publication.class);
 
 		final Dataset<Relation> rels = readPath(spark, graphPath + "/relation", Relation.class)
 			.filter(r -> !r.getRelClass().equals(BrokerConstants.IS_MERGED_IN_CLASS))
 			.cache();
 
 		final Dataset<OpenaireBrokerResult> r0 = readPath(
-			spark, graphPath + "/" + sourceClass.getSimpleName().toLowerCase(), Result.class)
+			spark, graphPath + "/" + sourceClass.getSimpleName().toLowerCase(), sourceClass)
 				.filter(r -> r.getDataInfo().getDeletedbyinference())
-				.map(ConversionUtils::oafResultToBrokerResult, Encoders.kryo(OpenaireBrokerResult.class));
+				.map(ConversionUtils::oafResultToBrokerResult, Encoders.bean(OpenaireBrokerResult.class));
 
+		// TODO UNCOMMENT THIS
 		final Dataset<OpenaireBrokerResult> r1 = join(r0, rels, relatedEntities(projects, rels, RelatedProject.class));
-		final Dataset<OpenaireBrokerResult> r2 = join(r1, rels, relatedEntities(softwares, rels, RelatedProject.class));
-		final Dataset<OpenaireBrokerResult> r3 = join(r2, rels, relatedEntities(datasets, rels, RelatedProject.class));
-		final Dataset<OpenaireBrokerResult> r4 = join(
-			r3, rels, relatedEntities(publications, rels, RelatedProject.class));
-		;
+		// final Dataset<OpenaireBrokerResult> r2 = join(r1, rels, relatedEntities(softwares, rels,
+		// RelatedSoftware.class));
+		// final Dataset<OpenaireBrokerResult> r3 = join(r2, rels, relatedEntities(datasets, rels,
+		// RelatedDataset.class));
+		// final Dataset<OpenaireBrokerResult> r4 = join(r3, rels, relatedEntities(publications, rels,
+		// RelatedPublication.class));;
 
-		return r4;
+		return r0; // TODO it should be r4
 	}
 
 	private static <T, RT> Dataset<RT> relatedEntities(final Dataset<T> targets,
@@ -165,7 +178,7 @@ public class GenerateEventsApplication {
 			.joinWith(targets, targets.col("id").equalTo(rels.col("target")), "inner")
 			.map(
 				t -> RelatedEntityFactory.newRelatedEntity(t._1.getSource(), t._1.getRelType(), t._2, clazz),
-				Encoders.kryo(clazz));
+				Encoders.bean(clazz));
 	}
 
 	private static <T> Dataset<OpenaireBrokerResult> join(final Dataset<OpenaireBrokerResult> sources,
@@ -174,14 +187,14 @@ public class GenerateEventsApplication {
 
 		final TypedColumn<Tuple2<OpenaireBrokerResult, T>, OpenaireBrokerResult> aggr = new OpenaireBrokerResultAggregator<T>()
 			.toColumn();
-		;
 
 		return sources
-			.joinWith(typedRels, sources.col("result.id").equalTo(rels.col("source")), "left_outer")
+			.joinWith(typedRels, sources.col("openaireId").equalTo(rels.col("source")), "left_outer")
 			.groupByKey(
 				(MapFunction<Tuple2<OpenaireBrokerResult, T>, String>) t -> t._1.getOpenaireId(), Encoders.STRING())
 			.agg(aggr)
-			.map(t -> t._2, Encoders.kryo(OpenaireBrokerResult.class));
+			.map(t -> t._2, Encoders.bean(OpenaireBrokerResult.class));
+
 	}
 
 	public static <R> Dataset<R> readPath(
@@ -195,6 +208,7 @@ public class GenerateEventsApplication {
 	}
 
 	private static DedupConfig loadDedupConfig(final String isLookupUrl, final String profId) throws Exception {
+
 		final ISLookUpService isLookUpService = ISLookupClientFactory.getLookUpService(isLookupUrl);
 
 		final String conf = isLookUpService
diff --git a/dhp-workflows/dhp-broker-events/src/main/java/eu/dnetlib/dhp/broker/oa/util/ConversionUtils.java b/dhp-workflows/dhp-broker-events/src/main/java/eu/dnetlib/dhp/broker/oa/util/ConversionUtils.java
index d04ef45a0e..730d065199 100644
--- a/dhp-workflows/dhp-broker-events/src/main/java/eu/dnetlib/dhp/broker/oa/util/ConversionUtils.java
+++ b/dhp-workflows/dhp-broker-events/src/main/java/eu/dnetlib/dhp/broker/oa/util/ConversionUtils.java
@@ -3,16 +3,18 @@ package eu.dnetlib.dhp.broker.oa.util;
 
 import java.util.ArrayList;
 import java.util.List;
+import java.util.Objects;
 import java.util.stream.Collectors;
 
 import org.apache.commons.lang3.StringUtils;
-import org.apache.commons.lang3.tuple.Pair;
 import org.dom4j.Document;
 import org.dom4j.DocumentException;
 import org.dom4j.DocumentHelper;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+import com.google.common.base.Function;
+
 import eu.dnetlib.broker.objects.OpenaireBrokerResult;
 import eu.dnetlib.broker.objects.TypedValue;
 import eu.dnetlib.dhp.schema.oaf.Author;
@@ -24,6 +26,7 @@ import eu.dnetlib.dhp.schema.oaf.Journal;
 import eu.dnetlib.dhp.schema.oaf.KeyValue;
 import eu.dnetlib.dhp.schema.oaf.Project;
 import eu.dnetlib.dhp.schema.oaf.Publication;
+import eu.dnetlib.dhp.schema.oaf.Qualifier;
 import eu.dnetlib.dhp.schema.oaf.Result;
 import eu.dnetlib.dhp.schema.oaf.Software;
 import eu.dnetlib.dhp.schema.oaf.StructuredProperty;
@@ -33,133 +36,133 @@ public class ConversionUtils {
 	private static final Logger log = LoggerFactory.getLogger(ConversionUtils.class);
 
 	public static List<eu.dnetlib.broker.objects.Instance> oafInstanceToBrokerInstances(final Instance i) {
-		return i.getUrl().stream().map(url -> {
-			return new eu.dnetlib.broker.objects.Instance()
-				.setUrl(url)
-				.setInstancetype(i.getInstancetype().getClassid())
-				.setLicense(BrokerConstants.OPEN_ACCESS)
-				.setHostedby(i.getHostedby().getValue());
-		}).collect(Collectors.toList());
+		if (i == null) {
+			return new ArrayList<>();
+		}
+
+		return mappedList(i.getUrl(), url -> {
+			final eu.dnetlib.broker.objects.Instance res = new eu.dnetlib.broker.objects.Instance();
+			res.setUrl(url);
+			res.setInstancetype(classId(i.getInstancetype()));
+			res.setLicense(BrokerConstants.OPEN_ACCESS);
+			res.setHostedby(kvValue(i.getHostedby()));
+			return res;
+		});
 	}
 
 	public static TypedValue oafPidToBrokerPid(final StructuredProperty sp) {
-		return sp != null ? new TypedValue()
-			.setValue(sp.getValue())
-			.setType(sp.getQualifier().getClassid()) : null;
+		return oafStructPropToBrokerTypedValue(sp);
 	}
 
-	public static final Pair<String, String> oafSubjectToPair(final StructuredProperty sp) {
-		return sp != null ? Pair.of(sp.getQualifier().getClassid(), sp.getValue()) : null;
+	public static TypedValue oafStructPropToBrokerTypedValue(final StructuredProperty sp) {
+		return sp != null ? new TypedValue(classId(sp.getQualifier()), sp.getValue()) : null;
 	}
 
 	public static final eu.dnetlib.broker.objects.Dataset oafDatasetToBrokerDataset(final Dataset d) {
-		return d != null ? new eu.dnetlib.broker.objects.Dataset()
-			.setOriginalId(d.getOriginalId().get(0))
-			.setTitle(structPropValue(d.getTitle()))
-			.setPids(d.getPid().stream().map(ConversionUtils::oafPidToBrokerPid).collect(Collectors.toList()))
-			.setInstances(
-				d
-					.getInstance()
-					.stream()
-					.map(ConversionUtils::oafInstanceToBrokerInstances)
-					.flatMap(List::stream)
-					.collect(Collectors.toList()))
-			.setCollectedFrom(d.getCollectedfrom().stream().map(KeyValue::getValue).findFirst().orElse(null))
-			: null;
+		if (d == null) {
+			return null;
+		}
+
+		final eu.dnetlib.broker.objects.Dataset res = new eu.dnetlib.broker.objects.Dataset();
+		res.setOriginalId(first(d.getOriginalId()));
+		res.setTitle(structPropValue(d.getTitle()));
+		res.setPids(mappedList(d.getPid(), ConversionUtils::oafPidToBrokerPid));
+		res.setInstances(flatMappedList(d.getInstance(), ConversionUtils::oafInstanceToBrokerInstances));
+		res.setCollectedFrom(mappedFirst(d.getCollectedfrom(), KeyValue::getValue));
+		return res;
 	}
 
 	public static eu.dnetlib.broker.objects.Publication oafPublicationToBrokerPublication(final Publication p) {
-		return p != null ? new eu.dnetlib.broker.objects.Publication()
-			.setOriginalId(p.getOriginalId().get(0))
-			.setTitle(structPropValue(p.getTitle()))
-			.setPids(p.getPid().stream().map(ConversionUtils::oafPidToBrokerPid).collect(Collectors.toList()))
-			.setInstances(
-				p
-					.getInstance()
-					.stream()
-					.map(ConversionUtils::oafInstanceToBrokerInstances)
-					.flatMap(List::stream)
-					.collect(Collectors.toList()))
-			.setCollectedFrom(p.getCollectedfrom().stream().map(KeyValue::getValue).findFirst().orElse(null))
-			: null;
+		if (p == null) {
+			return null;
+		}
+
+		final eu.dnetlib.broker.objects.Publication res = new eu.dnetlib.broker.objects.Publication();
+		res.setOriginalId(first(p.getOriginalId()));
+		res.setTitle(structPropValue(p.getTitle()));
+		res.setPids(mappedList(p.getPid(), ConversionUtils::oafPidToBrokerPid));
+		res.setInstances(flatMappedList(p.getInstance(), ConversionUtils::oafInstanceToBrokerInstances));
+		res.setCollectedFrom(mappedFirst(p.getCollectedfrom(), KeyValue::getValue));
+
+		return res;
 	}
 
 	public static final OpenaireBrokerResult oafResultToBrokerResult(final Result result) {
+		if (result == null) {
+			return null;
+		}
 
-		return result != null ? new OpenaireBrokerResult()
-			.setOpenaireId(result.getId())
-			.setOriginalId(result.getOriginalId().get(0))
-			.setTypology(result.getResulttype().getClassid())
-			.setTitles(structPropList(result.getTitle()))
-			.setAbstracts(fieldList(result.getDescription()))
-			.setLanguage(result.getLanguage().getClassid())
-			.setSubjects(structPropTypedList(result.getSubject()))
-			.setCreators(
-				result.getAuthor().stream().map(ConversionUtils::oafAuthorToBrokerAuthor).collect(Collectors.toList()))
-			.setPublicationdate(result.getDateofacceptance().getValue())
-			.setPublisher(fieldValue(result.getPublisher()))
-			.setEmbargoenddate(fieldValue(result.getEmbargoenddate()))
-			.setContributor(fieldList(result.getContributor()))
+		final OpenaireBrokerResult res = new OpenaireBrokerResult();
+
+		res.setOpenaireId(result.getId());
+		res.setOriginalId(first(result.getOriginalId()));
+		res.setTypology(classId(result.getResulttype()));
+		res.setTitles(structPropList(result.getTitle()));
+		res.setAbstracts(fieldList(result.getDescription()));
+		res.setLanguage(classId(result.getLanguage()));
+		res.setSubjects(structPropTypedList(result.getSubject()));
+		res.setCreators(mappedList(result.getAuthor(), ConversionUtils::oafAuthorToBrokerAuthor));
+		res.setPublicationdate(fieldValue(result.getDateofacceptance()));
+		res.setPublisher(fieldValue(result.getPublisher()));
+		res.setEmbargoenddate(fieldValue(result.getEmbargoenddate()));
+		res.setContributor(fieldList(result.getContributor()));
+		res
 			.setJournal(
-				result instanceof Publication ? oafJournalToBrokerJournal(((Publication) result).getJournal()) : null)
-			.setCollectedFromId(result.getCollectedfrom().stream().map(KeyValue::getKey).findFirst().orElse(null))
-			.setCollectedFromName(result.getCollectedfrom().stream().map(KeyValue::getValue).findFirst().orElse(null))
-			.setPids(result.getPid().stream().map(ConversionUtils::oafPidToBrokerPid).collect(Collectors.toList()))
-			.setInstances(
-				result
-					.getInstance()
-					.stream()
-					.map(ConversionUtils::oafInstanceToBrokerInstances)
-					.flatMap(List::stream)
-					.collect(Collectors.toList()))
-			.setExternalReferences(
-				result
-					.getExternalReference()
-					.stream()
-					.map(ConversionUtils::oafExtRefToBrokerExtRef)
-					.collect(Collectors.toList()))
-			: null;
-	}
+				result instanceof Publication ? oafJournalToBrokerJournal(((Publication) result).getJournal()) : null);
+		res.setCollectedFromId(mappedFirst(result.getCollectedfrom(), KeyValue::getKey));
+		res.setCollectedFromName(mappedFirst(result.getCollectedfrom(), KeyValue::getValue));
+		res.setPids(mappedList(result.getPid(), ConversionUtils::oafPidToBrokerPid));
+		res.setInstances(flatMappedList(result.getInstance(), ConversionUtils::oafInstanceToBrokerInstances));
+		res.setExternalReferences(mappedList(result.getExternalReference(), ConversionUtils::oafExtRefToBrokerExtRef));
 
-	private static List<TypedValue> structPropTypedList(final List<StructuredProperty> list) {
-		return list
-			.stream()
-			.map(
-				p -> new TypedValue()
-					.setValue(p.getValue())
-					.setType(p.getQualifier().getClassid()))
-			.collect(Collectors.toList());
+		return res;
 	}
 
 	private static eu.dnetlib.broker.objects.Author oafAuthorToBrokerAuthor(final Author author) {
-		return author != null ? new eu.dnetlib.broker.objects.Author()
-			.setFullname(author.getFullname())
-			.setOrcid(
-				author
-					.getPid()
-					.stream()
-					.filter(pid -> pid.getQualifier().getClassid().equalsIgnoreCase("orcid"))
-					.map(pid -> pid.getValue())
-					.findFirst()
-					.orElse(null))
-			: null;
+		if (author == null) {
+			return null;
+		}
+
+		final String pids = author.getPid() != null ? author
+			.getPid()
+			.stream()
+			.filter(pid -> pid != null)
+			.filter(pid -> pid.getQualifier() != null)
+			.filter(pid -> pid.getQualifier().getClassid() != null)
+			.filter(pid -> pid.getQualifier().getClassid().equalsIgnoreCase("orcid"))
+			.map(pid -> pid.getValue())
+			.filter(StringUtils::isNotBlank)
+			.findFirst()
+			.orElse(null) : null;
+
+		return new eu.dnetlib.broker.objects.Author(author.getFullname(), pids);
 	}
 
 	private static eu.dnetlib.broker.objects.Journal oafJournalToBrokerJournal(final Journal journal) {
-		return journal != null ? new eu.dnetlib.broker.objects.Journal()
-			.setName(journal.getName())
-			.setIssn(journal.getIssnPrinted())
-			.setEissn(journal.getIssnOnline())
-			.setLissn(journal.getIssnLinking()) : null;
+		if (journal == null) {
+			return null;
+		}
+
+		final eu.dnetlib.broker.objects.Journal res = new eu.dnetlib.broker.objects.Journal();
+		res.setName(journal.getName());
+		res.setIssn(journal.getIssnPrinted());
+		res.setEissn(journal.getIssnOnline());
+		res.setLissn(journal.getIssnLinking());
+
+		return res;
 	}
 
 	private static eu.dnetlib.broker.objects.ExternalReference oafExtRefToBrokerExtRef(final ExternalReference ref) {
-		return ref != null ? new eu.dnetlib.broker.objects.ExternalReference()
-			.setRefidentifier(ref.getRefidentifier())
-			.setSitename(ref.getSitename())
-			.setType(ref.getQualifier().getClassid())
-			.setUrl(ref.getUrl())
-			: null;
+		if (ref == null) {
+			return null;
+		}
+
+		final eu.dnetlib.broker.objects.ExternalReference res = new eu.dnetlib.broker.objects.ExternalReference();
+		res.setRefidentifier(ref.getRefidentifier());
+		res.setSitename(ref.getSitename());
+		res.setType(classId(ref.getQualifier()));
+		res.setUrl(ref.getUrl());
+		return res;
 	}
 
 	public static final eu.dnetlib.broker.objects.Project oafProjectToBrokerProject(final Project p) {
@@ -167,10 +170,10 @@ public class ConversionUtils {
 			return null;
 		}
 
-		final eu.dnetlib.broker.objects.Project res = new eu.dnetlib.broker.objects.Project()
-			.setTitle(fieldValue(p.getTitle()))
-			.setAcronym(fieldValue(p.getAcronym()))
-			.setCode(fieldValue(p.getCode()));
+		final eu.dnetlib.broker.objects.Project res = new eu.dnetlib.broker.objects.Project();
+		res.setTitle(fieldValue(p.getTitle()));
+		res.setAcronym(fieldValue(p.getAcronym()));
+		res.setCode(fieldValue(p.getCode()));
 
 		final String ftree = fieldValue(p.getFundingtree());
 		if (StringUtils.isNotBlank(ftree)) {
@@ -188,12 +191,25 @@ public class ConversionUtils {
 	}
 
 	public static final eu.dnetlib.broker.objects.Software oafSoftwareToBrokerSoftware(final Software sw) {
-		return sw != null ? new eu.dnetlib.broker.objects.Software()
-			.setName(structPropValue(sw.getTitle()))
-			.setDescription(fieldValue(sw.getDescription()))
-			.setRepository(fieldValue(sw.getCodeRepositoryUrl()))
-			.setLandingPage(fieldValue(sw.getDocumentationUrl()))
-			: null;
+		if (sw == null) {
+			return null;
+		}
+
+		final eu.dnetlib.broker.objects.Software res = new eu.dnetlib.broker.objects.Software();
+		res.setName(structPropValue(sw.getTitle()));
+		res.setDescription(fieldValue(sw.getDescription()));
+		res.setRepository(fieldValue(sw.getCodeRepositoryUrl()));
+		res.setLandingPage(fieldValue(sw.getDocumentationUrl()));
+
+		return res;
+	}
+
+	private static String first(final List<String> list) {
+		return list != null && list.size() > 0 ? list.get(0) : null;
+	}
+
+	private static String kvValue(final KeyValue kv) {
+		return kv != null ? kv.getValue() : null;
 	}
 
 	private static String fieldValue(final Field<String> f) {
@@ -205,6 +221,10 @@ public class ConversionUtils {
 			: null;
 	}
 
+	private static String classId(final Qualifier q) {
+		return q != null ? q.getClassid() : null;
+	}
+
 	private static String structPropValue(final List<StructuredProperty> props) {
 		return props != null
 			? props.stream().map(StructuredProperty::getValue).filter(StringUtils::isNotBlank).findFirst().orElse(null)
@@ -226,4 +246,55 @@ public class ConversionUtils {
 				.collect(Collectors.toList())
 			: new ArrayList<>();
 	}
+
+	private static List<TypedValue> structPropTypedList(final List<StructuredProperty> list) {
+		if (list == null) {
+			return new ArrayList<>();
+		}
+
+		return list
+			.stream()
+			.map(ConversionUtils::oafStructPropToBrokerTypedValue)
+			.filter(Objects::nonNull)
+			.collect(Collectors.toList());
+	}
+
+	private static <F, T> List<T> mappedList(final List<F> list, final Function<F, T> func) {
+		if (list == null) {
+			return new ArrayList<>();
+		}
+
+		return list
+			.stream()
+			.map(func::apply)
+			.filter(Objects::nonNull)
+			.collect(Collectors.toList());
+	}
+
+	private static <F, T> List<T> flatMappedList(final List<F> list, final Function<F, List<T>> func) {
+		if (list == null) {
+			return new ArrayList<>();
+		}
+
+		return list
+			.stream()
+			.map(func::apply)
+			.flatMap(List::stream)
+			.filter(Objects::nonNull)
+			.collect(Collectors.toList());
+	}
+
+	private static <F, T> T mappedFirst(final List<F> list, final Function<F, T> func) {
+		if (list == null) {
+			return null;
+		}
+
+		return list
+			.stream()
+			.map(func::apply)
+			.filter(Objects::nonNull)
+			.findFirst()
+			.orElse(null);
+	}
+
 }
diff --git a/dhp-workflows/dhp-broker-events/src/main/java/eu/dnetlib/dhp/broker/oa/util/UpdateInfo.java b/dhp-workflows/dhp-broker-events/src/main/java/eu/dnetlib/dhp/broker/oa/util/UpdateInfo.java
index 82d0178648..2c4bda53d6 100644
--- a/dhp-workflows/dhp-broker-events/src/main/java/eu/dnetlib/dhp/broker/oa/util/UpdateInfo.java
+++ b/dhp-workflows/dhp-broker-events/src/main/java/eu/dnetlib/dhp/broker/oa/util/UpdateInfo.java
@@ -63,8 +63,14 @@ public final class UpdateInfo<T> {
 		return target;
 	}
 
-	private float calculateTrust(final DedupConfig dedupConfig, final OpenaireBrokerResult r1,
+	private float calculateTrust(final DedupConfig dedupConfig,
+		final OpenaireBrokerResult r1,
 		final OpenaireBrokerResult r2) {
+
+		if (dedupConfig == null) {
+			return BrokerConstants.MIN_TRUST;
+		}
+
 		try {
 			final ObjectMapper objectMapper = new ObjectMapper();
 			final MapDocument doc1 = MapDocumentUtil
@@ -116,13 +122,15 @@ public final class UpdateInfo<T> {
 			.orElse(null);
 		;
 
-		final Provenance provenance = new Provenance().setId(provId).setRepositoryName(provRepo).setUrl(provUrl);
+		final Provenance provenance = new Provenance(provId, provRepo, provUrl);
 
-		return new OpenAireEventPayload()
-			.setPublication(target)
-			.setHighlight(hl)
-			.setTrust(trust)
-			.setProvenance(provenance);
+		final OpenAireEventPayload res = new OpenAireEventPayload();
+		res.setResult(target);
+		res.setHighlight(hl);
+		res.setTrust(trust);
+		res.setProvenance(provenance);
+
+		return res;
 	}
 
 }
diff --git a/dhp-workflows/dhp-broker-events/src/main/java/eu/dnetlib/dhp/broker/oa/util/aggregators/simple/ResultAggregator.java b/dhp-workflows/dhp-broker-events/src/main/java/eu/dnetlib/dhp/broker/oa/util/aggregators/simple/ResultAggregator.java
index dabe2bb4d6..a46fde445d 100644
--- a/dhp-workflows/dhp-broker-events/src/main/java/eu/dnetlib/dhp/broker/oa/util/aggregators/simple/ResultAggregator.java
+++ b/dhp-workflows/dhp-broker-events/src/main/java/eu/dnetlib/dhp/broker/oa/util/aggregators/simple/ResultAggregator.java
@@ -23,12 +23,14 @@ public class ResultAggregator extends Aggregator<Tuple2<OpenaireBrokerResult, Re
 
 	@Override
 	public ResultGroup reduce(final ResultGroup group, final Tuple2<OpenaireBrokerResult, Relation> t) {
-		return group.addElement(t._1);
+		group.getData().add(t._1);
+		return group;
 	}
 
 	@Override
 	public ResultGroup merge(final ResultGroup g1, final ResultGroup g2) {
-		return g1.addGroup(g2);
+		g1.getData().addAll(g2.getData());
+		return g1;
 	}
 
 	@Override
@@ -38,13 +40,13 @@ public class ResultAggregator extends Aggregator<Tuple2<OpenaireBrokerResult, Re
 
 	@Override
 	public Encoder<ResultGroup> bufferEncoder() {
-		return Encoders.kryo(ResultGroup.class);
+		return Encoders.bean(ResultGroup.class);
 
 	}
 
 	@Override
 	public Encoder<ResultGroup> outputEncoder() {
-		return Encoders.kryo(ResultGroup.class);
+		return Encoders.bean(ResultGroup.class);
 
 	}
 
diff --git a/dhp-workflows/dhp-broker-events/src/main/java/eu/dnetlib/dhp/broker/oa/util/aggregators/simple/ResultGroup.java b/dhp-workflows/dhp-broker-events/src/main/java/eu/dnetlib/dhp/broker/oa/util/aggregators/simple/ResultGroup.java
index 4308224a58..3f9dbe8af9 100644
--- a/dhp-workflows/dhp-broker-events/src/main/java/eu/dnetlib/dhp/broker/oa/util/aggregators/simple/ResultGroup.java
+++ b/dhp-workflows/dhp-broker-events/src/main/java/eu/dnetlib/dhp/broker/oa/util/aggregators/simple/ResultGroup.java
@@ -14,23 +14,14 @@ public class ResultGroup implements Serializable {
 	 */
 	private static final long serialVersionUID = -3360828477088669296L;
 
-	private final List<OpenaireBrokerResult> data = new ArrayList<>();
+	private List<OpenaireBrokerResult> data = new ArrayList<>();
 
 	public List<OpenaireBrokerResult> getData() {
 		return data;
 	}
 
-	public ResultGroup addElement(final OpenaireBrokerResult elem) {
-		data.add(elem);
-		return this;
+	public void setData(final List<OpenaireBrokerResult> data) {
+		this.data = data;
 	}
 
-	public ResultGroup addGroup(final ResultGroup group) {
-		data.addAll(group.getData());
-		return this;
-	}
-
-	public boolean isValid() {
-		return data.size() > 1;
-	}
 }
diff --git a/dhp-workflows/dhp-broker-events/src/main/java/eu/dnetlib/dhp/broker/oa/util/aggregators/withRels/OpenaireBrokerResultAggregator.java b/dhp-workflows/dhp-broker-events/src/main/java/eu/dnetlib/dhp/broker/oa/util/aggregators/withRels/OpenaireBrokerResultAggregator.java
index b44fbe367c..e72dcb9880 100644
--- a/dhp-workflows/dhp-broker-events/src/main/java/eu/dnetlib/dhp/broker/oa/util/aggregators/withRels/OpenaireBrokerResultAggregator.java
+++ b/dhp-workflows/dhp-broker-events/src/main/java/eu/dnetlib/dhp/broker/oa/util/aggregators/withRels/OpenaireBrokerResultAggregator.java
@@ -58,12 +58,12 @@ public class OpenaireBrokerResultAggregator<T>
 
 	@Override
 	public Encoder<OpenaireBrokerResult> bufferEncoder() {
-		return Encoders.kryo(OpenaireBrokerResult.class);
+		return Encoders.bean(OpenaireBrokerResult.class);
 	}
 
 	@Override
 	public Encoder<OpenaireBrokerResult> outputEncoder() {
-		return Encoders.kryo(OpenaireBrokerResult.class);
+		return Encoders.bean(OpenaireBrokerResult.class);
 	}
 
 }
diff --git a/dhp-workflows/dhp-broker-events/src/main/java/eu/dnetlib/dhp/broker/oa/util/aggregators/withRels/RelatedDataset.java b/dhp-workflows/dhp-broker-events/src/main/java/eu/dnetlib/dhp/broker/oa/util/aggregators/withRels/RelatedDataset.java
index fcf1b89b1c..6a5fb258cc 100644
--- a/dhp-workflows/dhp-broker-events/src/main/java/eu/dnetlib/dhp/broker/oa/util/aggregators/withRels/RelatedDataset.java
+++ b/dhp-workflows/dhp-broker-events/src/main/java/eu/dnetlib/dhp/broker/oa/util/aggregators/withRels/RelatedDataset.java
@@ -11,9 +11,12 @@ public class RelatedDataset implements Serializable {
 	 *
 	 */
 	private static final long serialVersionUID = 774487705184038324L;
-	private final String source;
-	private final String relType;
-	private final Dataset relDataset;
+	private String source;
+	private String relType;
+	private Dataset relDataset;
+
+	public RelatedDataset() {
+	}
 
 	public RelatedDataset(final String source, final String relType, final Dataset relDataset) {
 		this.source = source;
@@ -25,12 +28,24 @@ public class RelatedDataset implements Serializable {
 		return source;
 	}
 
+	public void setSource(final String source) {
+		this.source = source;
+	}
+
 	public String getRelType() {
 		return relType;
 	}
 
+	public void setRelType(final String relType) {
+		this.relType = relType;
+	}
+
 	public Dataset getRelDataset() {
 		return relDataset;
 	}
 
+	public void setRelDataset(final Dataset relDataset) {
+		this.relDataset = relDataset;
+	}
+
 }
diff --git a/dhp-workflows/dhp-broker-events/src/main/java/eu/dnetlib/dhp/broker/oa/util/aggregators/withRels/RelatedProject.java b/dhp-workflows/dhp-broker-events/src/main/java/eu/dnetlib/dhp/broker/oa/util/aggregators/withRels/RelatedProject.java
index 233041c096..fafec1e19c 100644
--- a/dhp-workflows/dhp-broker-events/src/main/java/eu/dnetlib/dhp/broker/oa/util/aggregators/withRels/RelatedProject.java
+++ b/dhp-workflows/dhp-broker-events/src/main/java/eu/dnetlib/dhp/broker/oa/util/aggregators/withRels/RelatedProject.java
@@ -12,9 +12,12 @@ public class RelatedProject implements Serializable {
 	 */
 	private static final long serialVersionUID = 4941437626549329870L;
 
-	private final String source;
-	private final String relType;
-	private final Project relProject;
+	private String source;
+	private String relType;
+	private Project relProject;
+
+	public RelatedProject() {
+	}
 
 	public RelatedProject(final String source, final String relType, final Project relProject) {
 		this.source = source;
@@ -26,12 +29,24 @@ public class RelatedProject implements Serializable {
 		return source;
 	}
 
+	public void setSource(final String source) {
+		this.source = source;
+	}
+
 	public String getRelType() {
 		return relType;
 	}
 
+	public void setRelType(final String relType) {
+		this.relType = relType;
+	}
+
 	public Project getRelProject() {
 		return relProject;
 	}
 
+	public void setRelProject(final Project relProject) {
+		this.relProject = relProject;
+	}
+
 }
diff --git a/dhp-workflows/dhp-broker-events/src/main/java/eu/dnetlib/dhp/broker/oa/util/aggregators/withRels/RelatedPublication.java b/dhp-workflows/dhp-broker-events/src/main/java/eu/dnetlib/dhp/broker/oa/util/aggregators/withRels/RelatedPublication.java
index 80b92462d1..8a31ddf7e2 100644
--- a/dhp-workflows/dhp-broker-events/src/main/java/eu/dnetlib/dhp/broker/oa/util/aggregators/withRels/RelatedPublication.java
+++ b/dhp-workflows/dhp-broker-events/src/main/java/eu/dnetlib/dhp/broker/oa/util/aggregators/withRels/RelatedPublication.java
@@ -12,9 +12,12 @@ public class RelatedPublication implements Serializable {
 	 */
 	private static final long serialVersionUID = 9021609640411395128L;
 
-	private final String source;
-	private final String relType;
-	private final Publication relPublication;
+	private String source;
+	private String relType;
+	private Publication relPublication;
+
+	public RelatedPublication() {
+	}
 
 	public RelatedPublication(final String source, final String relType, final Publication relPublication) {
 		this.source = source;
@@ -26,12 +29,24 @@ public class RelatedPublication implements Serializable {
 		return source;
 	}
 
+	public void setSource(final String source) {
+		this.source = source;
+	}
+
 	public String getRelType() {
 		return relType;
 	}
 
+	public void setRelType(final String relType) {
+		this.relType = relType;
+	}
+
 	public Publication getRelPublication() {
 		return relPublication;
 	}
 
+	public void setRelPublication(final Publication relPublication) {
+		this.relPublication = relPublication;
+	}
+
 }
diff --git a/dhp-workflows/dhp-broker-events/src/main/java/eu/dnetlib/dhp/broker/oa/util/aggregators/withRels/RelatedSoftware.java b/dhp-workflows/dhp-broker-events/src/main/java/eu/dnetlib/dhp/broker/oa/util/aggregators/withRels/RelatedSoftware.java
index 13f1f42909..3193874696 100644
--- a/dhp-workflows/dhp-broker-events/src/main/java/eu/dnetlib/dhp/broker/oa/util/aggregators/withRels/RelatedSoftware.java
+++ b/dhp-workflows/dhp-broker-events/src/main/java/eu/dnetlib/dhp/broker/oa/util/aggregators/withRels/RelatedSoftware.java
@@ -11,9 +11,12 @@ public class RelatedSoftware implements Serializable {
 	 *
 	 */
 	private static final long serialVersionUID = 7573383356943300157L;
-	private final String source;
-	private final String relType;
-	private final Software relSoftware;
+	private String source;
+	private String relType;
+	private Software relSoftware;
+
+	public RelatedSoftware() {
+	}
 
 	public RelatedSoftware(final String source, final String relType, final Software relSoftware) {
 		this.source = source;
@@ -25,12 +28,24 @@ public class RelatedSoftware implements Serializable {
 		return source;
 	}
 
+	public void setSource(final String source) {
+		this.source = source;
+	}
+
 	public String getRelType() {
 		return relType;
 	}
 
+	public void setRelType(final String relType) {
+		this.relType = relType;
+	}
+
 	public Software getRelSoftware() {
 		return relSoftware;
 	}
 
+	public void setRelSoftware(final Software relSoftware) {
+		this.relSoftware = relSoftware;
+	}
+
 }
diff --git a/dhp-workflows/dhp-broker-events/src/main/resources/eu/dnetlib/dhp/broker/oa/generate_all/oozie_app/workflow.xml b/dhp-workflows/dhp-broker-events/src/main/resources/eu/dnetlib/dhp/broker/oa/generate_all/oozie_app/workflow.xml
index da573ae9cd..ea9aabcfce 100644
--- a/dhp-workflows/dhp-broker-events/src/main/resources/eu/dnetlib/dhp/broker/oa/generate_all/oozie_app/workflow.xml
+++ b/dhp-workflows/dhp-broker-events/src/main/resources/eu/dnetlib/dhp/broker/oa/generate_all/oozie_app/workflow.xml
@@ -78,21 +78,33 @@
     <kill name="Kill">
         <message>Action failed, error message[${wf:errorMessage(wf:lastErrorNode())}]</message>
     </kill>
-
+    
     <action name="generate_events">
-        <java>
-            <prepare>
-                <delete path="${eventsOutputPath}"/>
-            </prepare>
-            <main-class>eu.dnetlib.dhp.broker.oa.GenerateEventsApplication</main-class>
+        <spark xmlns="uri:oozie:spark-action:0.2">
+            <master>yarn</master>
+            <mode>cluster</mode>
+            <name>GenerateEvents</name>
+            <class>eu.dnetlib.dhp.broker.oa.GenerateEventsApplication</class>
+            <jar>dhp-broker-events-${projectVersion}.jar</jar>
+            <spark-opts>
+                --executor-cores=${sparkExecutorCores}
+                --executor-memory=${sparkExecutorMemory}
+                --driver-memory=${sparkDriverMemory}
+                --conf spark.extraListeners=${spark2ExtraListeners}
+                --conf spark.sql.queryExecutionListeners=${spark2SqlQueryExecutionListeners}
+                --conf spark.yarn.historyServer.address=${spark2YarnHistoryServerAddress}
+                --conf spark.eventLog.dir=${nameNode}${spark2EventLogDir}
+                --conf spark.sql.shuffle.partitions=3840
+            </spark-opts>
             <arg>--graphPath</arg><arg>${graphInputPath}</arg>
             <arg>--eventsPath</arg><arg>${eventsOutputPath}</arg>
             <arg>--isLookupUrl</arg><arg>${isLookupUrl}</arg>
             <arg>--dedupConfProfile</arg><arg>${dedupConfProfId}</arg>
-        </java>
+        </spark>
         <ok to="End"/>
         <error to="Kill"/>
     </action>
+    
 
     <end name="End"/>
 
diff --git a/dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/clean/CleanGraphSparkJob.java b/dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/clean/CleanGraphSparkJob.java
index b2c7152d5f..c908988142 100644
--- a/dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/clean/CleanGraphSparkJob.java
+++ b/dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/clean/CleanGraphSparkJob.java
@@ -3,9 +3,13 @@ package eu.dnetlib.dhp.oa.graph.clean;
 
 import static eu.dnetlib.dhp.common.SparkSessionSupport.runWithSparkSession;
 
+import java.io.BufferedInputStream;
+import java.util.Objects;
 import java.util.Optional;
+import java.util.stream.Collectors;
 
 import org.apache.commons.io.IOUtils;
+import org.apache.commons.lang3.StringUtils;
 import org.apache.spark.SparkConf;
 import org.apache.spark.api.java.function.MapFunction;
 import org.apache.spark.sql.Dataset;
@@ -19,7 +23,9 @@ import com.fasterxml.jackson.databind.ObjectMapper;
 
 import eu.dnetlib.dhp.application.ArgumentApplicationParser;
 import eu.dnetlib.dhp.common.HdfsSupport;
+import eu.dnetlib.dhp.oa.graph.raw.common.OafMapperUtils;
 import eu.dnetlib.dhp.oa.graph.raw.common.VocabularyGroup;
+import eu.dnetlib.dhp.schema.common.ModelConstants;
 import eu.dnetlib.dhp.schema.oaf.*;
 import eu.dnetlib.dhp.utils.ISLookupClientFactory;
 import eu.dnetlib.enabling.is.lookup.rmi.ISLookUpService;
@@ -84,12 +90,83 @@ public class CleanGraphSparkJob {
 
 		readTableFromPath(spark, inputPath, clazz)
 			.map((MapFunction<T, T>) value -> OafCleaner.apply(value, mapping), Encoders.bean(clazz))
+			.map((MapFunction<T, T>) value -> fixDefaults(value), Encoders.bean(clazz))
 			.write()
 			.mode(SaveMode.Overwrite)
 			.option("compression", "gzip")
 			.json(outputPath);
 	}
 
+	private static <T extends Oaf> T fixDefaults(T value) {
+		if (value instanceof Datasource) {
+			// nothing to clean here
+		} else if (value instanceof Project) {
+			// nothing to clean here
+		} else if (value instanceof Organization) {
+			Organization o = (Organization) value;
+			if (Objects.isNull(o.getCountry()) || StringUtils.isBlank(o.getCountry().getClassid())) {
+				o.setCountry(qualifier("UNKNOWN", "Unknown", ModelConstants.DNET_COUNTRY_TYPE));
+			}
+		} else if (value instanceof Relation) {
+			// nothing to clean here
+		} else if (value instanceof Result) {
+
+			Result r = (Result) value;
+			if (Objects.isNull(r.getLanguage()) || StringUtils.isBlank(r.getLanguage().getClassid())) {
+				r
+					.setLanguage(
+						qualifier("und", "Undetermined", ModelConstants.DNET_LANGUAGES));
+			}
+			if (Objects.nonNull(r.getSubject())) {
+				r
+					.setSubject(
+						r
+							.getSubject()
+							.stream()
+							.filter(Objects::nonNull)
+							.filter(sp -> StringUtils.isNotBlank(sp.getValue()))
+							.filter(sp -> Objects.nonNull(sp.getQualifier()))
+							.filter(sp -> StringUtils.isNotBlank(sp.getQualifier().getClassid()))
+							.collect(Collectors.toList()));
+			}
+			if (Objects.isNull(r.getResourcetype()) || StringUtils.isBlank(r.getResourcetype().getClassid())) {
+				r
+					.setResourcetype(
+						qualifier("UNKNOWN", "Unknown", ModelConstants.DNET_DATA_CITE_RESOURCE));
+			}
+			if (Objects.isNull(r.getBestaccessright()) || StringUtils.isBlank(r.getBestaccessright().getClassid())) {
+				r
+					.setBestaccessright(
+						qualifier("UNKNOWN", "not available", ModelConstants.DNET_ACCESS_MODES));
+			}
+			if (Objects.nonNull(r.getInstance())) {
+				for (Instance i : r.getInstance()) {
+					if (Objects.isNull(i.getAccessright()) || StringUtils.isBlank(i.getAccessright().getClassid())) {
+						i.setAccessright(qualifier("UNKNOWN", "not available", ModelConstants.DNET_ACCESS_MODES));
+					}
+				}
+			}
+
+			if (value instanceof Publication) {
+
+			} else if (value instanceof eu.dnetlib.dhp.schema.oaf.Dataset) {
+
+			} else if (value instanceof OtherResearchProduct) {
+
+			} else if (value instanceof Software) {
+
+			}
+		}
+
+		return value;
+	}
+
+	private static Qualifier qualifier(String classid, String classname, String scheme) {
+		return OafMapperUtils
+			.qualifier(
+				classid, classname, scheme, scheme);
+	}
+
 	private static <T extends Oaf> Dataset<T> readTableFromPath(
 		SparkSession spark, String inputEntityPath, Class<T> clazz) {
 
diff --git a/dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/clean/CleaningRuleMap.java b/dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/clean/CleaningRuleMap.java
index 8006f73009..d2d4e118fd 100644
--- a/dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/clean/CleaningRuleMap.java
+++ b/dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/clean/CleaningRuleMap.java
@@ -4,10 +4,13 @@ package eu.dnetlib.dhp.oa.graph.clean;
 import java.io.Serializable;
 import java.util.HashMap;
 
+import org.apache.commons.lang3.StringUtils;
+
 import eu.dnetlib.dhp.common.FunctionalInterfaceSupport.SerializableConsumer;
 import eu.dnetlib.dhp.oa.graph.raw.common.VocabularyGroup;
+import eu.dnetlib.dhp.schema.common.ModelConstants;
+import eu.dnetlib.dhp.schema.oaf.Country;
 import eu.dnetlib.dhp.schema.oaf.Qualifier;
-import eu.dnetlib.dhp.schema.oaf.StructuredProperty;
 
 public class CleaningRuleMap extends HashMap<Class, SerializableConsumer<Object>> implements Serializable {
 
@@ -18,23 +21,24 @@ public class CleaningRuleMap extends HashMap<Class, SerializableConsumer<Object>
 	 */
 	public static CleaningRuleMap create(VocabularyGroup vocabularies) {
 		CleaningRuleMap mapping = new CleaningRuleMap();
-		mapping.put(Qualifier.class, o -> {
-			Qualifier q = (Qualifier) o;
-			if (vocabularies.vocabularyExists(q.getSchemeid())) {
-				Qualifier newValue = vocabularies.lookup(q.getSchemeid(), q.getClassid());
-				q.setClassid(newValue.getClassid());
-				q.setClassname(newValue.getClassname());
+		mapping.put(Qualifier.class, o -> cleanQualifier(vocabularies, (Qualifier) o));
+		mapping.put(Country.class, o -> {
+			final Country c = (Country) o;
+			if (StringUtils.isBlank(c.getSchemeid())) {
+				c.setSchemeid(ModelConstants.DNET_COUNTRY_TYPE);
+				c.setSchemename(ModelConstants.DNET_COUNTRY_TYPE);
 			}
-		});
-		mapping.put(StructuredProperty.class, o -> {
-			StructuredProperty sp = (StructuredProperty) o;
-			// TODO implement a policy
-			/*
-			 * if (StringUtils.isBlank(sp.getValue())) { sp.setValue(null); sp.setQualifier(null); sp.setDataInfo(null);
-			 * }
-			 */
+			cleanQualifier(vocabularies, c);
 		});
 		return mapping;
 	}
 
+	private static <Q extends Qualifier> void cleanQualifier(VocabularyGroup vocabularies, Q q) {
+		if (vocabularies.vocabularyExists(q.getSchemeid())) {
+			Qualifier newValue = vocabularies.lookup(q.getSchemeid(), q.getClassid());
+			q.setClassid(newValue.getClassid());
+			q.setClassname(newValue.getClassname());
+		}
+	}
+
 }
diff --git a/dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/raw/common/VocabularyGroup.java b/dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/raw/common/VocabularyGroup.java
index d9ff62596a..334339d3be 100644
--- a/dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/raw/common/VocabularyGroup.java
+++ b/dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/raw/common/VocabularyGroup.java
@@ -122,7 +122,11 @@ public class VocabularyGroup implements Serializable {
 	}
 
 	public boolean vocabularyExists(final String vocId) {
-		return vocs.containsKey(vocId.toLowerCase());
+		return Optional
+			.ofNullable(vocId)
+			.map(String::toLowerCase)
+			.map(id -> vocs.containsKey(id))
+			.orElse(false);
 	}
 
 	private void addSynonyms(final String vocId, final String termId, final String syn) {
diff --git a/dhp-workflows/dhp-graph-mapper/src/test/java/eu/dnetlib/dhp/oa/graph/clean/CleaningFunctionTest.java b/dhp-workflows/dhp-graph-mapper/src/test/java/eu/dnetlib/dhp/oa/graph/clean/CleaningFunctionTest.java
index 1b21ce2d37..4783aa81f6 100644
--- a/dhp-workflows/dhp-graph-mapper/src/test/java/eu/dnetlib/dhp/oa/graph/clean/CleaningFunctionTest.java
+++ b/dhp-workflows/dhp-graph-mapper/src/test/java/eu/dnetlib/dhp/oa/graph/clean/CleaningFunctionTest.java
@@ -21,6 +21,7 @@ import com.fasterxml.jackson.databind.ObjectMapper;
 import eu.dnetlib.dhp.oa.graph.raw.common.VocabularyGroup;
 import eu.dnetlib.dhp.schema.oaf.Publication;
 import eu.dnetlib.dhp.schema.oaf.Qualifier;
+import eu.dnetlib.dhp.schema.oaf.Result;
 import eu.dnetlib.enabling.is.lookup.rmi.ISLookUpException;
 import eu.dnetlib.enabling.is.lookup.rmi.ISLookUpService;
 
@@ -56,6 +57,9 @@ public class CleaningFunctionTest {
 		String json = IOUtils.toString(getClass().getResourceAsStream("/eu/dnetlib/dhp/oa/graph/clean/result.json"));
 		Publication p_in = MAPPER.readValue(json, Publication.class);
 
+		assertTrue(p_in instanceof Result);
+		assertTrue(p_in instanceof Publication);
+
 		Publication p_out = OafCleaner.apply(p_in, mapping);
 
 		assertNotNull(p_out);
@@ -63,6 +67,9 @@ public class CleaningFunctionTest {
 		assertEquals("und", p_out.getLanguage().getClassid());
 		assertEquals("Undetermined", p_out.getLanguage().getClassname());
 
+		assertEquals("DE", p_out.getCountry().get(0).getClassid());
+		assertEquals("Germany", p_out.getCountry().get(0).getClassname());
+
 		assertEquals("0018", p_out.getInstance().get(0).getInstancetype().getClassid());
 		assertEquals("Annotation", p_out.getInstance().get(0).getInstancetype().getClassname());
 
diff --git a/dhp-workflows/dhp-graph-mapper/src/test/resources/eu/dnetlib/dhp/oa/graph/clean/result.json b/dhp-workflows/dhp-graph-mapper/src/test/resources/eu/dnetlib/dhp/oa/graph/clean/result.json
index b63a12f619..2c1d5017d6 100644
--- a/dhp-workflows/dhp-graph-mapper/src/test/resources/eu/dnetlib/dhp/oa/graph/clean/result.json
+++ b/dhp-workflows/dhp-graph-mapper/src/test/resources/eu/dnetlib/dhp/oa/graph/clean/result.json
@@ -202,6 +202,12 @@
   "contributor": [
   ],
   "country": [
+    {
+      "classid": "DE",
+      "classname": "DE",
+      "schemeid": "dnet:countries",
+      "schemename": "dnet:countries"
+    }
   ],
   "coverage": [
   ],