diff --git a/dhp-workflows/dhp-aggregation/src/main/java/eu/dnetlib/dhp/actionmanager/bipmodel/Constants.java b/dhp-workflows/dhp-aggregation/src/main/java/eu/dnetlib/dhp/actionmanager/Constants.java
similarity index 58%
rename from dhp-workflows/dhp-aggregation/src/main/java/eu/dnetlib/dhp/actionmanager/bipmodel/Constants.java
rename to dhp-workflows/dhp-aggregation/src/main/java/eu/dnetlib/dhp/actionmanager/Constants.java
index 131d5fa07..7a3814b71 100644
--- a/dhp-workflows/dhp-aggregation/src/main/java/eu/dnetlib/dhp/actionmanager/bipmodel/Constants.java
+++ b/dhp-workflows/dhp-aggregation/src/main/java/eu/dnetlib/dhp/actionmanager/Constants.java
@@ -1,8 +1,11 @@
 
-package eu.dnetlib.dhp.actionmanager.bipmodel;
+package eu.dnetlib.dhp.actionmanager;
 
 import java.util.Optional;
 
+import eu.dnetlib.dhp.schema.common.ModelConstants;
+import eu.dnetlib.dhp.schema.oaf.StructuredProperty;
+import eu.dnetlib.dhp.schema.oaf.utils.OafMapperUtils;
 import org.apache.spark.api.java.function.MapFunction;
 import org.apache.spark.sql.Dataset;
 import org.apache.spark.sql.Encoders;
@@ -46,4 +49,36 @@ public class Constants {
 			.map((MapFunction<String, R>) value -> OBJECT_MAPPER.readValue(value, clazz), Encoders.bean(clazz));
 	}
 
+	public static StructuredProperty getSubject(String sbj, String classid, String classname) {
+		if (sbj.equals(NULL))
+			return null;
+		StructuredProperty sp = new StructuredProperty();
+		sp.setValue(sbj);
+		sp
+				.setQualifier(
+						OafMapperUtils
+								.qualifier(classid
+										,
+										classname,
+										ModelConstants.DNET_SUBJECT_TYPOLOGIES,
+										ModelConstants.DNET_SUBJECT_TYPOLOGIES));
+		sp
+				.setDataInfo(
+						OafMapperUtils
+								.dataInfo(
+										false,
+										UPDATE_DATA_INFO_TYPE,
+										true,
+										false,
+										OafMapperUtils
+												.qualifier(
+														UPDATE_SUBJECT_FOS_CLASS_ID,
+														UPDATE_CLASS_NAME,
+														ModelConstants.DNET_PROVENANCE_ACTIONS,
+														ModelConstants.DNET_PROVENANCE_ACTIONS),
+										""));
+
+		return sp;
+
+	}
 }
diff --git a/dhp-workflows/dhp-aggregation/src/main/java/eu/dnetlib/dhp/actionmanager/bipfinder/SparkAtomicActionScoreJob.java b/dhp-workflows/dhp-aggregation/src/main/java/eu/dnetlib/dhp/actionmanager/bipfinder/SparkAtomicActionScoreJob.java
index fafa209ea..ddf5f4adf 100644
--- a/dhp-workflows/dhp-aggregation/src/main/java/eu/dnetlib/dhp/actionmanager/bipfinder/SparkAtomicActionScoreJob.java
+++ b/dhp-workflows/dhp-aggregation/src/main/java/eu/dnetlib/dhp/actionmanager/bipfinder/SparkAtomicActionScoreJob.java
@@ -1,7 +1,7 @@
 
 package eu.dnetlib.dhp.actionmanager.bipfinder;
 
-import static eu.dnetlib.dhp.actionmanager.bipmodel.Constants.*;
+import static eu.dnetlib.dhp.actionmanager.Constants.*;
 import static eu.dnetlib.dhp.common.SparkSessionSupport.runWithSparkSession;
 
 import java.io.Serializable;
diff --git a/dhp-workflows/dhp-aggregation/src/main/java/eu/dnetlib/dhp/actionmanager/createunresolvedentities/PrepareBipFinder.java b/dhp-workflows/dhp-aggregation/src/main/java/eu/dnetlib/dhp/actionmanager/createunresolvedentities/PrepareBipFinder.java
index 8d89d958d..e9c9f0350 100644
--- a/dhp-workflows/dhp-aggregation/src/main/java/eu/dnetlib/dhp/actionmanager/createunresolvedentities/PrepareBipFinder.java
+++ b/dhp-workflows/dhp-aggregation/src/main/java/eu/dnetlib/dhp/actionmanager/createunresolvedentities/PrepareBipFinder.java
@@ -1,8 +1,8 @@
 
 package eu.dnetlib.dhp.actionmanager.createunresolvedentities;
 
-import static eu.dnetlib.dhp.actionmanager.bipmodel.Constants.*;
-import static eu.dnetlib.dhp.actionmanager.bipmodel.Constants.UPDATE_CLASS_NAME;
+import static eu.dnetlib.dhp.actionmanager.Constants.*;
+import static eu.dnetlib.dhp.actionmanager.Constants.UPDATE_CLASS_NAME;
 import static eu.dnetlib.dhp.common.SparkSessionSupport.runWithSparkSession;
 
 import java.io.Serializable;
diff --git a/dhp-workflows/dhp-aggregation/src/main/java/eu/dnetlib/dhp/actionmanager/createunresolvedentities/PrepareFOSSparkJob.java b/dhp-workflows/dhp-aggregation/src/main/java/eu/dnetlib/dhp/actionmanager/createunresolvedentities/PrepareFOSSparkJob.java
index 558f51f3f..1a6e9ddfc 100644
--- a/dhp-workflows/dhp-aggregation/src/main/java/eu/dnetlib/dhp/actionmanager/createunresolvedentities/PrepareFOSSparkJob.java
+++ b/dhp-workflows/dhp-aggregation/src/main/java/eu/dnetlib/dhp/actionmanager/createunresolvedentities/PrepareFOSSparkJob.java
@@ -1,7 +1,7 @@
 
 package eu.dnetlib.dhp.actionmanager.createunresolvedentities;
 
-import static eu.dnetlib.dhp.actionmanager.bipmodel.Constants.*;
+import static eu.dnetlib.dhp.actionmanager.Constants.*;
 import static eu.dnetlib.dhp.common.SparkSessionSupport.runWithSparkSession;
 
 import java.io.Serializable;
@@ -10,7 +10,6 @@ import java.util.stream.Collectors;
 
 import org.apache.commons.io.IOUtils;
 import org.apache.spark.SparkConf;
-import org.apache.spark.api.java.function.FlatMapFunction;
 import org.apache.spark.api.java.function.MapFunction;
 import org.apache.spark.sql.Dataset;
 import org.apache.spark.sql.Encoders;
@@ -21,10 +20,8 @@ import org.slf4j.LoggerFactory;
 
 import eu.dnetlib.dhp.actionmanager.createunresolvedentities.model.FOSDataModel;
 import eu.dnetlib.dhp.application.ArgumentApplicationParser;
-import eu.dnetlib.dhp.schema.common.ModelConstants;
 import eu.dnetlib.dhp.schema.oaf.Result;
 import eu.dnetlib.dhp.schema.oaf.StructuredProperty;
-import eu.dnetlib.dhp.schema.oaf.utils.OafMapperUtils;
 import eu.dnetlib.dhp.utils.DHPUtils;
 
 public class PrepareFOSSparkJob implements Serializable {
@@ -67,17 +64,7 @@ public class PrepareFOSSparkJob implements Serializable {
 	private static void distributeFOSdois(SparkSession spark, String sourcePath, String outputPath) {
 		Dataset<FOSDataModel> fosDataset = readPath(spark, sourcePath, FOSDataModel.class);
 
-		fosDataset.flatMap((FlatMapFunction<FOSDataModel, FOSDataModel>) v -> {
-			List<FOSDataModel> fosList = new ArrayList<>();
-			final String level1 = v.getLevel1();
-			final String level2 = v.getLevel2();
-			final String level3 = v.getLevel3();
-			Arrays
-				.stream(v.getDoi().split("\u0002"))
-				.forEach(d -> fosList.add(FOSDataModel.newInstance(d, level1, level2, level3)));
-			return fosList.iterator();
-		}, Encoders.bean(FOSDataModel.class))
-			.map((MapFunction<FOSDataModel, Result>) value -> {
+		fosDataset.map((MapFunction<FOSDataModel, Result>) value -> {
 				Result r = new Result();
 				r.setId(DHPUtils.generateUnresolvedIdentifier(value.getDoi(), DOI));
 				r.setSubject(getSubjects(value));
@@ -91,43 +78,14 @@ public class PrepareFOSSparkJob implements Serializable {
 
 	private static List<StructuredProperty> getSubjects(FOSDataModel fos) {
 		return Arrays
-			.asList(getSubject(fos.getLevel1()), getSubject(fos.getLevel2()), getSubject(fos.getLevel3()))
+			.asList(getSubject(fos.getLevel1(), FOS_CLASS_ID, FOS_CLASS_NAME),
+					getSubject(fos.getLevel2(), FOS_CLASS_ID, FOS_CLASS_NAME),
+					getSubject(fos.getLevel3(), FOS_CLASS_ID, FOS_CLASS_NAME))
 			.stream()
 			.filter(Objects::nonNull)
 			.collect(Collectors.toList());
 	}
 
-	private static StructuredProperty getSubject(String sbj) {
-		if (sbj.equals(NULL))
-			return null;
-		StructuredProperty sp = new StructuredProperty();
-		sp.setValue(sbj);
-		sp
-			.setQualifier(
-				OafMapperUtils
-					.qualifier(
-						FOS_CLASS_ID,
-						FOS_CLASS_NAME,
-						ModelConstants.DNET_SUBJECT_TYPOLOGIES,
-						ModelConstants.DNET_SUBJECT_TYPOLOGIES));
-		sp
-			.setDataInfo(
-				OafMapperUtils
-					.dataInfo(
-						false,
-						UPDATE_DATA_INFO_TYPE,
-						true,
-						false,
-						OafMapperUtils
-							.qualifier(
-								UPDATE_SUBJECT_FOS_CLASS_ID,
-								UPDATE_CLASS_NAME,
-								ModelConstants.DNET_PROVENANCE_ACTIONS,
-								ModelConstants.DNET_PROVENANCE_ACTIONS),
-						""));
 
-		return sp;
-
-	}
 
 }
diff --git a/dhp-workflows/dhp-aggregation/src/main/java/eu/dnetlib/dhp/actionmanager/createunresolvedentities/SparkSaveUnresolved.java b/dhp-workflows/dhp-aggregation/src/main/java/eu/dnetlib/dhp/actionmanager/createunresolvedentities/SparkSaveUnresolved.java
index 1a115e18f..ab8356836 100644
--- a/dhp-workflows/dhp-aggregation/src/main/java/eu/dnetlib/dhp/actionmanager/createunresolvedentities/SparkSaveUnresolved.java
+++ b/dhp-workflows/dhp-aggregation/src/main/java/eu/dnetlib/dhp/actionmanager/createunresolvedentities/SparkSaveUnresolved.java
@@ -1,7 +1,7 @@
 
 package eu.dnetlib.dhp.actionmanager.createunresolvedentities;
 
-import static eu.dnetlib.dhp.actionmanager.bipmodel.Constants.*;
+import static eu.dnetlib.dhp.actionmanager.Constants.*;
 import static eu.dnetlib.dhp.common.SparkSessionSupport.runWithSparkSession;
 
 import java.io.Serializable;