diff --git a/dhp-schemas/src/main/java/eu/dnetlib/dhp/schema/dump/oaf/Context.java b/dhp-schemas/src/main/java/eu/dnetlib/dhp/schema/dump/oaf/Context.java
index 21267486a..915974d86 100644
--- a/dhp-schemas/src/main/java/eu/dnetlib/dhp/schema/dump/oaf/Context.java
+++ b/dhp-schemas/src/main/java/eu/dnetlib/dhp/schema/dump/oaf/Context.java
@@ -2,6 +2,7 @@
 package eu.dnetlib.dhp.schema.dump.oaf;
 
 import java.util.List;
+import java.util.Objects;
 
 public class Context extends Qualifier {
 	private List<Provenance> provenance;
@@ -13,4 +14,15 @@ public class Context extends Qualifier {
 	public void setProvenance(List<Provenance> provenance) {
 		this.provenance = provenance;
 	}
+
+
+	@Override
+	public int hashCode() {
+		String provenance = new String();
+		this.provenance.forEach(p -> provenance.concat(p.toString()));
+		return Objects.hash(getCode(), getLabel(), provenance);
+	}
+
+
+
 }
diff --git a/dhp-schemas/src/main/java/eu/dnetlib/dhp/schema/dump/oaf/Country.java b/dhp-schemas/src/main/java/eu/dnetlib/dhp/schema/dump/oaf/Country.java
index d75272513..749474e87 100644
--- a/dhp-schemas/src/main/java/eu/dnetlib/dhp/schema/dump/oaf/Country.java
+++ b/dhp-schemas/src/main/java/eu/dnetlib/dhp/schema/dump/oaf/Country.java
@@ -21,7 +21,7 @@ public class Country extends Qualifier {
 		return c;
 	}
 
-	public static Country newInstance(String code, String label, String provenance, String trust){
+	public static Country newInstance(String code, String label, String provenance, String trust) {
 		return newInstance(code, label, Provenance.newInstance(provenance, trust));
 	}
 
diff --git a/dhp-schemas/src/main/java/eu/dnetlib/dhp/schema/dump/oaf/Pid.java b/dhp-schemas/src/main/java/eu/dnetlib/dhp/schema/dump/oaf/Pid.java
index 5bdc0cdbe..fb200028b 100644
--- a/dhp-schemas/src/main/java/eu/dnetlib/dhp/schema/dump/oaf/Pid.java
+++ b/dhp-schemas/src/main/java/eu/dnetlib/dhp/schema/dump/oaf/Pid.java
@@ -1,24 +1,25 @@
+
 package eu.dnetlib.dhp.schema.dump.oaf;
 
 import java.io.Serializable;
 
 public class Pid implements Serializable {
-    private ControlledField pid;
-    private Provenance provenance;
+	private ControlledField pid;
+	private Provenance provenance;
 
-    public ControlledField getPid() {
-        return pid;
-    }
+	public ControlledField getPid() {
+		return pid;
+	}
 
-    public void setPid(ControlledField pid) {
-        this.pid = pid;
-    }
+	public void setPid(ControlledField pid) {
+		this.pid = pid;
+	}
 
-    public Provenance getProvenance() {
-        return provenance;
-    }
+	public Provenance getProvenance() {
+		return provenance;
+	}
 
-    public void setProvenance(Provenance provenance) {
-        this.provenance = provenance;
-    }
+	public void setProvenance(Provenance provenance) {
+		this.provenance = provenance;
+	}
 }
diff --git a/dhp-schemas/src/main/java/eu/dnetlib/dhp/schema/dump/oaf/Provenance.java b/dhp-schemas/src/main/java/eu/dnetlib/dhp/schema/dump/oaf/Provenance.java
index f3115819f..bfd84dfee 100644
--- a/dhp-schemas/src/main/java/eu/dnetlib/dhp/schema/dump/oaf/Provenance.java
+++ b/dhp-schemas/src/main/java/eu/dnetlib/dhp/schema/dump/oaf/Provenance.java
@@ -1,31 +1,36 @@
+
 package eu.dnetlib.dhp.schema.dump.oaf;
 
 import java.io.Serializable;
 
-public class Provenance  implements Serializable {
-    private String provenance;
-    private String trust;
+public class Provenance implements Serializable {
+	private String provenance;
+	private String trust;
 
-    public String getProvenance() {
-        return provenance;
-    }
+	public String getProvenance() {
+		return provenance;
+	}
 
-    public void setProvenance(String provenance) {
-        this.provenance = provenance;
-    }
+	public void setProvenance(String provenance) {
+		this.provenance = provenance;
+	}
 
-    public String getTrust() {
-        return trust;
-    }
+	public String getTrust() {
+		return trust;
+	}
 
-    public void setTrust(String trust) {
-        this.trust = trust;
-    }
+	public void setTrust(String trust) {
+		this.trust = trust;
+	}
 
-    public static Provenance newInstance(String provenance, String trust){
-        Provenance p = new Provenance();
-        p.provenance = provenance;
-        p.trust = trust;
-        return p;
-    }
+	public static Provenance newInstance(String provenance, String trust) {
+		Provenance p = new Provenance();
+		p.provenance = provenance;
+		p.trust = trust;
+		return p;
+	}
+
+	public String toString(){
+		return provenance + trust;
+	}
 }
diff --git a/dhp-schemas/src/main/java/eu/dnetlib/dhp/schema/dump/oaf/Result.java b/dhp-schemas/src/main/java/eu/dnetlib/dhp/schema/dump/oaf/Result.java
index 6ba70bcef..ac1dae382 100644
--- a/dhp-schemas/src/main/java/eu/dnetlib/dhp/schema/dump/oaf/Result.java
+++ b/dhp-schemas/src/main/java/eu/dnetlib/dhp/schema/dump/oaf/Result.java
@@ -4,7 +4,9 @@ package eu.dnetlib.dhp.schema.dump.oaf;
 import java.io.Serializable;
 import java.util.List;
 
-public class Result extends OafEntity implements Serializable {
+import eu.dnetlib.dhp.schema.dump.oaf.community.Project;
+
+public class Result implements Serializable {
 
 	private List<Author> author;
 
@@ -40,8 +42,6 @@ public class Result extends OafEntity implements Serializable {
 
 	private AccessRight bestaccessright;
 
-	private List<Context> context;
-
 	private List<ExternalReference> externalReference;
 
 	private List<Instance> instance;
@@ -66,6 +66,56 @@ public class Result extends OafEntity implements Serializable {
 
 	private List<GeoLocation> geolocation; // dataset
 
+	private String id;
+
+	private List<String> originalId;
+
+	private List<ControlledField> pid;
+
+	private String dateofcollection;
+
+	private Long lastupdatetimestamp;
+
+	public Long getLastupdatetimestamp() {
+		return lastupdatetimestamp;
+	}
+
+	public void setLastupdatetimestamp(Long lastupdatetimestamp) {
+		this.lastupdatetimestamp = lastupdatetimestamp;
+	}
+
+	public String getId() {
+		return id;
+	}
+
+	public void setId(String id) {
+		this.id = id;
+	}
+
+	public List<String> getOriginalId() {
+		return originalId;
+	}
+
+	public void setOriginalId(List<String> originalId) {
+		this.originalId = originalId;
+	}
+
+	public List<ControlledField> getPid() {
+		return pid;
+	}
+
+	public void setPid(List<ControlledField> pid) {
+		this.pid = pid;
+	}
+
+	public String getDateofcollection() {
+		return dateofcollection;
+	}
+
+	public void setDateofcollection(String dateofcollection) {
+		this.dateofcollection = dateofcollection;
+	}
+
 	public List<Author> getAuthor() {
 		return author;
 	}
@@ -202,14 +252,6 @@ public class Result extends OafEntity implements Serializable {
 		this.bestaccessright = bestaccessright;
 	}
 
-	public List<Context> getContext() {
-		return context;
-	}
-
-	public void setContext(List<Context> context) {
-		this.context = context;
-	}
-
 	public List<ExternalReference> getExternalReference() {
 		return externalReference;
 	}
diff --git a/dhp-schemas/src/main/java/eu/dnetlib/dhp/schema/dump/oaf/Subject.java b/dhp-schemas/src/main/java/eu/dnetlib/dhp/schema/dump/oaf/Subject.java
index 1587e29ad..4c9bf352b 100644
--- a/dhp-schemas/src/main/java/eu/dnetlib/dhp/schema/dump/oaf/Subject.java
+++ b/dhp-schemas/src/main/java/eu/dnetlib/dhp/schema/dump/oaf/Subject.java
@@ -1,25 +1,26 @@
+
 package eu.dnetlib.dhp.schema.dump.oaf;
 
 import java.io.Serializable;
 
 public class Subject implements Serializable {
-    private ControlledField subject;
-    private Provenance provenance;
+	private ControlledField subject;
+	private Provenance provenance;
 
-    public ControlledField getSubject() {
-        return subject;
-    }
+	public ControlledField getSubject() {
+		return subject;
+	}
 
-    public void setSubject(ControlledField subject) {
-        this.subject = subject;
-    }
+	public void setSubject(ControlledField subject) {
+		this.subject = subject;
+	}
 
-    public Provenance getProvenance() {
-        return provenance;
-    }
+	public Provenance getProvenance() {
+		return provenance;
+	}
 
-    public void setProvenance(Provenance provenance) {
-        this.provenance = provenance;
-    }
+	public void setProvenance(Provenance provenance) {
+		this.provenance = provenance;
+	}
 
 }