diff --git a/dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/hostedbymap/Aggregators.scala b/dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/hostedbymap/Aggregators.scala
index 6a9346ed50..8077efe302 100644
--- a/dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/hostedbymap/Aggregators.scala
+++ b/dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/hostedbymap/Aggregators.scala
@@ -1,5 +1,6 @@
 package eu.dnetlib.dhp.oa.graph.hostedbymap
 
+import eu.dnetlib.dhp.oa.graph.hostedbymap.model.EntityInfo
 import org.apache.spark.sql.{Dataset, Encoder, Encoders, TypedColumn}
 import org.apache.spark.sql.expressions.Aggregator
 
@@ -25,43 +26,10 @@ object Aggregators {
   }
 
 
-  def createHostedByItemTypes(df: Dataset[HostedByItemType]): Dataset[HostedByItemType] = {
-      val transformedData : Dataset[HostedByItemType] = df
-          .groupByKey(_.id)(Encoders.STRING)
-        .agg(Aggregators.hostedByAggregator)
-          .map{
-            case (id:String , res:HostedByItemType) => res
-          }(Encoders.product[HostedByItemType])
-
-    transformedData
-    }
-
-  val hostedByAggregator: TypedColumn[HostedByItemType, HostedByItemType] = new Aggregator[HostedByItemType, HostedByItemType, HostedByItemType] {
-    override def zero: HostedByItemType = HostedByItemType("","","","","",false)
-    override def reduce(b: HostedByItemType, a:HostedByItemType): HostedByItemType = {
-      return merge(b, a)
-    }
-    override def merge(b1: HostedByItemType, b2: HostedByItemType): HostedByItemType = {
-      if (b1 == null){
-        return b2
-      }
-      if(b2 == null){
-        return b1
-      }
-
-      HostedByItemType(getId(b1.id, b2.id), getId(b1.officialname, b2.officialname),  getId(b1.issn, b2.issn), getId(b1.eissn, b2.eissn), getId(b1.lissn, b2.lissn), b1.openAccess || b2.openAccess)
-
-    }
-    override def finish(reduction: HostedByItemType): HostedByItemType = reduction
-    override def bufferEncoder: Encoder[HostedByItemType] = Encoders.product[HostedByItemType]
-
-    override def outputEncoder: Encoder[HostedByItemType] = Encoders.product[HostedByItemType]
-  }.toColumn
-
   def explodeHostedByItemType(df: Dataset[(String, HostedByItemType)]): Dataset[(String, HostedByItemType)] = {
     val transformedData : Dataset[(String, HostedByItemType)] = df
       .groupByKey(_._1)(Encoders.STRING)
-      .agg(Aggregators.hostedByAggregator1)
+      .agg(Aggregators.hostedByAggregator)
       .map{
         case (id:String , res:(String, HostedByItemType)) => res
       }(Encoders.tuple(Encoders.STRING, Encoders.product[HostedByItemType]))
@@ -69,7 +37,7 @@ object Aggregators {
     transformedData
   }
 
-  val hostedByAggregator1: TypedColumn[(String, HostedByItemType), (String, HostedByItemType)] = new Aggregator[(String, HostedByItemType), (String, HostedByItemType), (String, HostedByItemType)] {
+  val hostedByAggregator: TypedColumn[(String, HostedByItemType), (String, HostedByItemType)] = new Aggregator[(String, HostedByItemType), (String, HostedByItemType), (String, HostedByItemType)] {
     override def zero: (String, HostedByItemType) = ("", HostedByItemType("","","","","",false))
     override def reduce(b: (String, HostedByItemType), a:(String,HostedByItemType)): (String, HostedByItemType) = {
       return merge(b, a)
@@ -94,4 +62,79 @@ object Aggregators {
     override def outputEncoder: Encoder[(String,HostedByItemType)] = Encoders.tuple(Encoders.STRING,Encoders.product[HostedByItemType])
   }.toColumn
 
+  def hostedByToSingleDSId(df: Dataset[ HostedByItemType]): Dataset[ HostedByItemType] = {
+    val transformedData : Dataset[HostedByItemType] = df
+      .groupByKey(_.id)(Encoders.STRING)
+      .agg(Aggregators.hostedByToDSAggregator)
+      .map{
+        case (id:String , res: HostedByItemType) => res
+      }(Encoders.product[HostedByItemType])
+
+    transformedData
+  }
+
+  def hostedByToDSAggregator: TypedColumn[HostedByItemType, HostedByItemType] = new Aggregator[HostedByItemType, HostedByItemType, HostedByItemType] {
+    override def zero: HostedByItemType = HostedByItemType("","","","","",false)
+
+    override def reduce(b: HostedByItemType, a:HostedByItemType):  HostedByItemType = {
+      return merge(b, a)
+    }
+    override def merge(b1: HostedByItemType, b2: HostedByItemType): HostedByItemType = {
+      if (b1 == null){
+        return b2
+      }
+      if(b2 == null){
+        return b1
+      }
+      if(!b1.id.equals("")){
+        return HostedByItemType(b1.id, b1.officialname, b1.issn, b1.eissn, b1.lissn, b1.openAccess || b2.openAccess)
+
+      }
+      return HostedByItemType(b2.id, b2.officialname, b2.issn, b2.eissn, b2.lissn, b1.openAccess || b2.openAccess)
+
+    }
+    override def finish(reduction: HostedByItemType):  HostedByItemType = reduction
+    override def bufferEncoder: Encoder[HostedByItemType] = Encoders.product[HostedByItemType]
+
+    override def outputEncoder: Encoder[HostedByItemType] = Encoders.product[HostedByItemType]
+  }.toColumn
+
+
+  def resultToSingleIdAggregator: TypedColumn[EntityInfo, EntityInfo] = new Aggregator[EntityInfo, EntityInfo, EntityInfo]{
+    override def zero: EntityInfo = EntityInfo.newInstance("","","")
+
+    override def reduce(b: EntityInfo, a:EntityInfo):  EntityInfo = {
+      return merge(b, a)
+    }
+    override def merge(b1: EntityInfo, b2: EntityInfo): EntityInfo = {
+      if (b1 == null){
+        return b2
+      }
+      if(b2 == null){
+        return b1
+      }
+      if(!b1.getHb_id.equals("")){
+        b1.setOpenaccess(b1.getOpenaccess || b2.getOpenaccess)
+      }
+      b2.setOpenaccess(b1.getOpenaccess || b2.getOpenaccess)
+      b2
+
+    }
+    override def finish(reduction: EntityInfo):  EntityInfo = reduction
+    override def bufferEncoder: Encoder[EntityInfo] = Encoders.bean(classOf[EntityInfo])
+
+    override def outputEncoder: Encoder[EntityInfo] = Encoders.bean(classOf[EntityInfo])
+  }.toColumn
+
+  def resultToSingleId(df:Dataset[EntityInfo]): Dataset[EntityInfo] = {
+    val transformedData : Dataset[EntityInfo] = df
+      .groupByKey(_.getId)(Encoders.STRING)
+      .agg(Aggregators.resultToSingleIdAggregator)
+      .map{
+        case (id:String , res: EntityInfo) => res
+      }(Encoders.bean(classOf[EntityInfo]))
+
+    transformedData
+  }
+
 }
diff --git a/dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/hostedbymap/SparkPrepareHostedByInfoToApply.scala b/dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/hostedbymap/SparkPrepareHostedByInfoToApply.scala
new file mode 100644
index 0000000000..03ab09d8e8
--- /dev/null
+++ b/dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/hostedbymap/SparkPrepareHostedByInfoToApply.scala
@@ -0,0 +1,147 @@
+package eu.dnetlib.dhp.oa.graph.hostedbymap
+
+import com.fasterxml.jackson.databind.ObjectMapper
+import eu.dnetlib.dhp.application.ArgumentApplicationParser
+import eu.dnetlib.dhp.oa.graph.hostedbymap.model.{DatasourceInfo, EntityInfo}
+import eu.dnetlib.dhp.schema.oaf.{Datasource, Journal, Publication}
+import org.apache.commons.io.IOUtils
+import org.apache.spark.SparkConf
+import org.apache.spark.sql.{Dataset, Encoder, Encoders, SaveMode, SparkSession}
+import org.json4s
+import org.json4s.DefaultFormats
+import org.json4s.jackson.JsonMethods.parse
+import org.slf4j.{Logger, LoggerFactory}
+
+object SparkPrepareHostedByInfoToApply {
+
+
+  implicit val mapEncoderDSInfo: Encoder[DatasourceInfo] = Encoders.kryo[DatasourceInfo]
+  implicit val mapEncoderPInfo: Encoder[EntityInfo] = Encoders.kryo[EntityInfo]
+
+  def getList(id: String, j: Journal, name: String ) : List[EntityInfo] = {
+    var lst:List[EntityInfo] = List()
+
+
+    if (j.getIssnLinking != null && !j.getIssnLinking.equals("")){
+      lst = EntityInfo.newInstance(id, j.getIssnLinking, name) :: lst
+    }
+    if (j.getIssnOnline != null && !j.getIssnOnline.equals("")){
+      lst = EntityInfo.newInstance(id, j.getIssnOnline, name) :: lst
+    }
+    if (j.getIssnPrinted != null && !j.getIssnPrinted.equals("")){
+      lst = EntityInfo.newInstance(id, j.getIssnPrinted, name) :: lst
+    }
+    lst
+  }
+
+  def prepareResultInfo(spark:SparkSession, publicationPath:String) : Dataset[EntityInfo] = {
+    implicit val mapEncoderPubs: Encoder[Publication] = Encoders.bean(classOf[Publication])
+
+    val mapper = new ObjectMapper()
+
+    val dd : Dataset[Publication] = spark.read.textFile(publicationPath)
+      .map(r => mapper.readValue(r, classOf[Publication]))
+
+    dd.filter(p => p.getJournal != null ).flatMap(p => getList(p.getId, p.getJournal, ""))
+
+  }
+
+
+
+  def prepareDatasourceInfo(spark:SparkSession, datasourcePath:String) : Dataset[DatasourceInfo] = {
+    implicit val mapEncoderDats: Encoder[Datasource] = Encoders.bean(classOf[Datasource])
+
+    val mapper = new ObjectMapper()
+
+    val dd : Dataset[Datasource] = spark.read.textFile(datasourcePath)
+      .map(r => mapper.readValue(r, classOf[Datasource]))
+
+    dd.filter(d => d.getJournal != null ).map(d => DatasourceInfo.newInstance(d.getId, d.getOfficialname.getValue,
+      d.getJournal.getIssnPrinted, d.getJournal.getIssnOnline, d.getJournal.getIssnLinking))
+
+  }
+  def toHostedByItem(input:String): HostedByItemType = {
+    implicit lazy val formats: DefaultFormats.type = org.json4s.DefaultFormats
+
+    lazy val json: json4s.JValue = parse(input)
+    val c :Map[String,HostedByItemType] = json.extract[Map[String, HostedByItemType]]
+    c.values.head
+  }
+
+  def explodeJournalInfo(input: DatasourceInfo): List[EntityInfo] = {
+    var lst : List[EntityInfo] = List()
+    if (input.getEissn != null && !input.getEissn.equals("")){
+      lst = EntityInfo.newInstance(input.getId, input.getEissn, input.getOfficialname, input.getOpenAccess) :: lst
+    }
+
+    lst
+  }
+
+  def main(args: Array[String]): Unit = {
+
+
+    val logger: Logger = LoggerFactory.getLogger(getClass)
+    val conf: SparkConf = new SparkConf()
+    val parser = new ArgumentApplicationParser(IOUtils.toString(getClass.getResourceAsStream("/eu/dnetlib/dhp/oa/graph/hostedbymap/hostedby_prepare_params.json")))
+    parser.parseArgument(args)
+    val spark: SparkSession =
+      SparkSession
+        .builder()
+        .config(conf)
+        .appName(getClass.getSimpleName)
+        .master(parser.get("master")).getOrCreate()
+
+
+    val graphPath = parser.get("graphPath")
+
+    val outputPath = parser.get("outputPath")
+    val hostedByMapPath = parser.get("hostedByMapPath")
+
+
+    implicit val formats = DefaultFormats
+
+
+    logger.info("Getting the Datasources")
+
+    import spark.implicits._
+
+    //STEP1: leggere le DS e creare le entries {dsid, dsofficialname, issn, eissn, lissn, openaccess}
+    val datasourceInfoDataset: Dataset[DatasourceInfo] = prepareDatasourceInfo(spark, "$graphPath/datasource")
+
+    //STEP2: leggere la hostedbymap e raggruppare per datasource id
+    val hostedByDataset  = Aggregators.hostedByToSingleDSId(spark.createDataset(spark.sparkContext.textFile(hostedByMapPath).map(toHostedByItem)))
+
+    //STEP3: eseguire una join fra le datasource e la hostedby map (left) per settare se la datasource e' open access o no
+    //ed esplodere l'info della datasource per ogni journal id diverso da nullo
+    val join : Dataset[EntityInfo] = datasourceInfoDataset.joinWith(hostedByDataset,
+      datasourceInfoDataset.col("id").equalTo(hostedByDataset.col("id"), "left"))
+      .map(t2 => {
+        val dsi : DatasourceInfo = t2._1
+        if(t2._2 != null){
+          dsi.setOpenAccess(t2._2.openAccess)
+        }
+        dsi
+      }).flatMap(explodeJournalInfo)
+
+    //STEP4: creare la mappa publication id issn, eissn, lissn esplosa
+    val resultInfoDataset:Dataset[EntityInfo] = prepareResultInfo(spark, "$graphPath/publication")
+
+    //STEP5: join di join con resultInfo sul journal_id dal result con left
+    // e riduzione di tutti i result con lo stesso id in una unica entry
+    Aggregators.resultToSingleId(resultInfoDataset.joinWith(join, resultInfoDataset.col("journal_id").equalTo(join.col("journal_id")), "left")
+      .map(t2 => {
+        val res: EntityInfo = t2._1
+        if(t2._2 != null ){
+          val ds = t2._2
+          res.setHb_id(ds.getId)
+          res.setOpenaccess(ds.getOpenaccess)
+          res.setName(ds.getName)
+        }
+        res
+      })).write.mode(SaveMode.Overwrite).option("compression", "gzip").json(outputPath)
+
+
+
+  }
+
+}