diff --git a/airflow/dags/EOSC_entity_trasform.py b/airflow/dags/EOSC_entity_trasform.py
index c910333..8ea86f3 100644
--- a/airflow/dags/EOSC_entity_trasform.py
+++ b/airflow/dags/EOSC_entity_trasform.py
@@ -23,19 +23,48 @@ def trasform_catalog_entity(p: dict) -> dict:
     p['_id'] = p['id']
     return p
 
+
+def map_fos_topic_to_domain(fos: str):
+    res = dict()
+    if fos.startswith('01'):
+        res['domain'] = 'Natural Sciences'
+    if fos.startswith('02'):
+        res['domain'] = 'Engineering & Technology'
+    if fos.startswith('03'):
+        res['domain'] = 'Medical & Health Sciences'
+    if fos.startswith('04'):
+        res['domain'] = 'Agricultural Sciences'
+    if fos.startswith('05'):
+        res['domain'] = 'Social Sciences'
+    if fos.startswith('06'):
+        res['domain'] = 'Humanities'
+    return res
+
 def trasform_product(p: dict) -> dict:
     p = trasform_graph_entity(p)
     p['accessRights'] = list(
         filter(lambda ar: ar != '', map(lambda m: map_access_right(m.get('access_right')), p.get('manifestations'))))
+    p['keyword'] = list(
+        map(lambda topic: topic.get('value'),
+            filter(lambda topic: topic.get('topic').get('scheme') == 'keyword', p.get('topics'))))
+    p['domain'] = list(filter(lambda fos: fos is not None,
+                              map(lambda topic: map_fos_topic_to_domain(topic.get('value')),
+                                  filter(lambda topic: topic.get('topic').get('scheme') == 'FOS', p.get('topics')))))
+
+    p['firstPublishDate'] = next(
+        iter(sorted(filter(lambda date: date.get('type') == 'publishing', p.get('manifestations').get('dates')))),
+        None)
+
     return p
 
+
 transform_entities = {
     # SKG-IF graph entities
     "datasource": trasform_graph_entity,
     "grants": trasform_graph_entity,
     "organizations": trasform_graph_entity,
     "persons": trasform_graph_entity,
-    "products": trasform_graph_entity,
+    "products": trasform_product,
     "topics": trasform_graph_entity,
     "venues": trasform_graph_entity,
     # EOSC catalog entities
diff --git a/airflow/dags/EOSC_indexes.py b/airflow/dags/EOSC_indexes.py
index 9455c3a..365bfd5 100644
--- a/airflow/dags/EOSC_indexes.py
+++ b/airflow/dags/EOSC_indexes.py
@@ -325,6 +325,28 @@ mappings['grants'] = {
 
 mappings['products'] = {
     "properties": {
+        ### Syntethic fields
+        "accessRights": {
+            "type": "keyword"
+        },
+        "domain": {
+            "type": "object",
+            "properties": {
+                "domain": {
+                    "type": "keyword"
+                },
+                "subdomain": {
+                    "type": "keyword"
+                }
+            }
+        },
+        "firstPublishDate": {
+            "type": "date"
+        },
+        "keyword": {
+            "type": "keyword"
+        },
+        ###
         "abstracts": {
             "type": "object",
             "properties": {