diff --git a/src/main/java/eu/dnetlib/dhp/schema/solr/Pid.java b/src/main/java/eu/dnetlib/dhp/schema/solr/Pid.java
index 7c42c29..27dcff5 100644
--- a/src/main/java/eu/dnetlib/dhp/schema/solr/Pid.java
+++ b/src/main/java/eu/dnetlib/dhp/schema/solr/Pid.java
@@ -6,25 +6,20 @@ public class Pid implements Serializable {
 
     private static final long serialVersionUID = -943684282582228545L;
 
-    private String type;
-
     private String value;
 
-    public static Pid newInstance(String type, String value) {
+    private String typeCode;
+
+    private String typeLabel;
+
+    public static Pid newInstance(String value, String typeCode, String typeLabel) {
         Pid p = new Pid();
-        p.setType(type);
         p.setValue(value);
+        p.setTypeCode(typeCode);
+        p.setTypeLabel(typeLabel);
         return p;
     }
 
-    public String getType() {
-        return type;
-    }
-
-    public void setType(String type) {
-        this.type = type;
-    }
-
     public String getValue() {
         return value;
     }
@@ -32,4 +27,20 @@ public class Pid implements Serializable {
     public void setValue(String value) {
         this.value = value;
     }
+
+    public String getTypeCode() {
+        return typeCode;
+    }
+
+    public void setTypeCode(String typeCode) {
+        this.typeCode = typeCode;
+    }
+
+    public String getTypeLabel() {
+        return typeLabel;
+    }
+
+    public void setTypeLabel(String typeLabel) {
+        this.typeLabel = typeLabel;
+    }
 }
diff --git a/src/main/java/eu/dnetlib/dhp/schema/solr/RelatedRecord.java b/src/main/java/eu/dnetlib/dhp/schema/solr/RelatedRecord.java
index 1b20777..d91d5ef 100644
--- a/src/main/java/eu/dnetlib/dhp/schema/solr/RelatedRecord.java
+++ b/src/main/java/eu/dnetlib/dhp/schema/solr/RelatedRecord.java
@@ -39,6 +39,7 @@ public class RelatedRecord implements Serializable {
     private String acronym;
     private CodeLabel contracttype;
     private Funding funding;
+    private String validationDate;
 
     public RelatedRecordHeader getHeader() {
         return header;
@@ -215,4 +216,12 @@ public class RelatedRecord implements Serializable {
     public void setFunding(Funding funding) {
         this.funding = funding;
     }
+
+    public String getValidationDate() {
+        return validationDate;
+    }
+
+    public void setValidationDate(String validationDate) {
+        this.validationDate = validationDate;
+    }
 }
diff --git a/src/main/java/eu/dnetlib/dhp/schema/solr/RelatedRecordHeader.java b/src/main/java/eu/dnetlib/dhp/schema/solr/RelatedRecordHeader.java
index db89b6c..7d7d479 100644
--- a/src/main/java/eu/dnetlib/dhp/schema/solr/RelatedRecordHeader.java
+++ b/src/main/java/eu/dnetlib/dhp/schema/solr/RelatedRecordHeader.java
@@ -14,12 +14,15 @@ public class RelatedRecordHeader implements Serializable {
 
     private RecordType relatedRecordType;
 
-    public static RelatedRecordHeader newInstance(String relationType, String relationClass, String relatedIdentifier, RecordType relatedRecordType) {
+    private String relationProvenance;
+
+    public static RelatedRecordHeader newInstance(String relationType, String relationClass, String relatedIdentifier, RecordType relatedRecordType, String relationProvenance) {
         RelatedRecordHeader header = new RelatedRecordHeader();
         header.setRelationType(relationType);
         header.setRelationClass(relationClass);
         header.setRelatedIdentifier(relatedIdentifier);
         header.setRelatedRecordType(relatedRecordType);
+        header.setRelationProvenance(relationProvenance);
         return header;
     }
 
@@ -54,4 +57,12 @@ public class RelatedRecordHeader implements Serializable {
     public void setRelatedRecordType(RecordType relatedRecordType) {
         this.relatedRecordType = relatedRecordType;
     }
+
+    public String getRelationProvenance() {
+        return relationProvenance;
+    }
+
+    public void setRelationProvenance(String relationProvenance) {
+        this.relationProvenance = relationProvenance;
+    }
 }
diff --git a/src/main/java/eu/dnetlib/dhp/schema/solr/SolrRecordHeader.java b/src/main/java/eu/dnetlib/dhp/schema/solr/SolrRecordHeader.java
index 04bde53..f15530b 100644
--- a/src/main/java/eu/dnetlib/dhp/schema/solr/SolrRecordHeader.java
+++ b/src/main/java/eu/dnetlib/dhp/schema/solr/SolrRecordHeader.java
@@ -7,6 +7,8 @@ public class SolrRecordHeader implements Serializable {
 
     private static final long serialVersionUID = -6052397109220149426L;
 
+    public enum Status { UNDER_CURATION }
+
     /**
      * The OpenAIRE identifiers for this record
      */
@@ -19,13 +21,20 @@ public class SolrRecordHeader implements Serializable {
 
     private RecordType recordType;
 
+    private Status status = null;
+
     private Boolean deletedbyinference;
 
     public static SolrRecordHeader newInstance(String id, List<String> originalId, RecordType recordType, Boolean deletedbyinference) {
+        return newInstance(id, originalId, recordType, null, deletedbyinference);
+    }
+
+    public static SolrRecordHeader newInstance(String id, List<String> originalId, RecordType recordType, Status status, Boolean deletedbyinference) {
         SolrRecordHeader header = new SolrRecordHeader();
         header.setId(id);
         header.setOriginalId(originalId);
         header.setRecordType(recordType);
+        header.setStatus(status);
         header.setDeletedbyinference(deletedbyinference);
         return header;
     }
@@ -58,6 +67,14 @@ public class SolrRecordHeader implements Serializable {
         return deletedbyinference;
     }
 
+    public Status getStatus() {
+        return status;
+    }
+
+    public void setStatus(Status status) {
+        this.status = status;
+    }
+
     public void setDeletedbyinference(Boolean deletedbyinference) {
         this.deletedbyinference = deletedbyinference;
     }
diff --git a/src/main/java/eu/dnetlib/dhp/schema/solr/Subject.java b/src/main/java/eu/dnetlib/dhp/schema/solr/Subject.java
index 9f13c41..f7cbe06 100644
--- a/src/main/java/eu/dnetlib/dhp/schema/solr/Subject.java
+++ b/src/main/java/eu/dnetlib/dhp/schema/solr/Subject.java
@@ -8,12 +8,15 @@ public class Subject implements Serializable {
 
     private String value;
 
-    private String type;
+    private String typeCode;
 
-    public static Subject newInstance(String value, String type) {
+    private String typeLabel;
+
+    public static Subject newInstance(String value, String typeCode, String typeLabel) {
         Subject s = new Subject();
         s.setValue(value);
-        s.setType(type);
+        s.setTypeCode(typeCode);
+        s.setTypeLabel(typeLabel);
         return s;
     }
 
@@ -25,11 +28,19 @@ public class Subject implements Serializable {
         this.value = value;
     }
 
-    public String getType() {
-        return type;
+    public String getTypeCode() {
+        return typeCode;
     }
 
-    public void setType(String type) {
-        this.type = type;
+    public void setTypeCode(String typeCode) {
+        this.typeCode = typeCode;
+    }
+
+    public String getTypeLabel() {
+        return typeLabel;
+    }
+
+    public void setTypeLabel(String typeLabel) {
+        this.typeLabel = typeLabel;
     }
 }