diff --git a/ckanext/relationship/logic/action.py b/ckanext/relationship/logic/action.py
index 513212a..005d699 100644
--- a/ckanext/relationship/logic/action.py
+++ b/ckanext/relationship/logic/action.py
@@ -44,6 +44,7 @@ def relationship_relation_create(
     subject_id = data_dict["subject_id"]
     object_id = data_dict["object_id"]
     relation_type = data_dict.get("relation_type")
+    extras = data_dict.get("extras", {})
 
     if Relationship.by_object_id(subject_id, object_id, relation_type):
         return []
@@ -52,12 +53,14 @@ def relationship_relation_create(
         subject_id=subject_id,
         object_id=object_id,
         relation_type=relation_type,
+        extras=extras,
     )
 
     reverse_relation = Relationship(
         subject_id=object_id,
         object_id=subject_id,
         relation_type=Relationship.reverse_relation_type[relation_type],
+        extras=extras,
     )
 
     context["session"].add(relation)
diff --git a/ckanext/relationship/logic/schema.py b/ckanext/relationship/logic/schema.py
index 2ab7f88..52944da 100644
--- a/ckanext/relationship/logic/schema.py
+++ b/ckanext/relationship/logic/schema.py
@@ -1,9 +1,15 @@
 from ckan.logic.schema import validator_args
-from ckan.types import Schema, Validator
+from ckan.types import Schema, Validator, ValidatorFactory
 
 
 @validator_args
-def relation_create(not_empty: Validator, one_of: Validator) -> Schema:
+def relation_create(
+    not_empty: Validator,
+    one_of: Validator,
+    default: ValidatorFactory,
+    convert_to_json_if_string: Validator,
+    dict_only: Validator,
+) -> Schema:
     return {
         "subject_id": [
             not_empty,
@@ -14,6 +20,7 @@ def relation_create(not_empty: Validator, one_of: Validator) -> Schema:
         "relation_type": [
             one_of(["related_to", "child_of", "parent_of"]),
         ],
+        "extras": [default("{}"), convert_to_json_if_string, dict_only],
     }
 
 
diff --git a/ckanext/relationship/migration/relationship/versions/dd010e8e0680_add_extras_and_created_at_columns.py b/ckanext/relationship/migration/relationship/versions/dd010e8e0680_add_extras_and_created_at_columns.py
new file mode 100644
index 0000000..4816514
--- /dev/null
+++ b/ckanext/relationship/migration/relationship/versions/dd010e8e0680_add_extras_and_created_at_columns.py
@@ -0,0 +1,35 @@
+"""Add extras and created_at columns.
+
+Revision ID: dd010e8e0680
+Revises: aca2ff1d3ce4
+Create Date: 2024-10-31 01:30:49.251175
+
+"""
+
+import sqlalchemy as sa
+from alembic import op
+from sqlalchemy.dialects.postgresql import JSONB
+
+# revision identifiers, used by Alembic.
+revision = "dd010e8e0680"
+down_revision = "aca2ff1d3ce4"
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    op.add_column(
+        "relationship_relationship",
+        sa.Column("extras", JSONB, nullable=False, server_default="{}"),
+    )
+    op.add_column(
+        "relationship_relationship",
+        sa.Column(
+            "created_at", sa.DateTime, nullable=False, server_default=sa.text("now()")
+        ),
+    )
+
+
+def downgrade():
+    op.drop_column("relationship_relationship", "created_at")
+    op.drop_column("relationship_relationship", "extras")
diff --git a/ckanext/relationship/model/relationship.py b/ckanext/relationship/model/relationship.py
index 02406df..69169ee 100644
--- a/ckanext/relationship/model/relationship.py
+++ b/ckanext/relationship/model/relationship.py
@@ -1,6 +1,9 @@
 from __future__ import annotations
 
-from sqlalchemy import Column, Text, or_
+from datetime import datetime
+
+from sqlalchemy import Column, DateTime, Text, or_
+from sqlalchemy.dialects.postgresql import JSONB
 
 from ckan import logic, model
 from ckan.model.types import make_uuid
@@ -14,6 +17,8 @@ class Relationship(Base):
     subject_id: str = Column(Text, nullable=False)
     object_id: str = Column(Text, nullable=False)
     relation_type: str = Column(Text, nullable=False)
+    created_at: datetime = Column(DateTime, nullable=False, default=datetime.utcnow)
+    extras: dict = Column(JSONB, nullable=False, default=dict)
 
     reverse_relation_type = {
         "related_to": "related_to",
@@ -27,7 +32,9 @@ def __repr__(self):
             f"id={self.id!r}, "
             f"subject_id={self.subject_id!r}, "
             f"object_id={self.object_id!r}, "
-            f"relation_type={self.relation_type!r})"
+            f"relation_type={self.relation_type!r}, "
+            f"created_at={self.created_at!r}, "
+            f"extras={self.extras!r})"
         )
 
     def as_dict(self):
@@ -36,6 +43,8 @@ def as_dict(self):
             "subject_id": self.subject_id,
             "object_id": self.object_id,
             "relation_type": self.relation_type,
+            "created_at": self.created_at.isoformat() if self.created_at else None,
+            "extras": self.extras,
         }
 
     @classmethod
diff --git a/ckanext/relationship/tests/logic/test_action.py b/ckanext/relationship/tests/logic/test_action.py
index 34ed6ac..645019c 100644
--- a/ckanext/relationship/tests/logic/test_action.py
+++ b/ckanext/relationship/tests/logic/test_action.py
@@ -246,6 +246,46 @@ def test_no_relation_type(self):
                 object_id=object_id,
             )
 
+    def test_created_at(self):
+        subject_dataset = factories.Dataset()
+        object_dataset = factories.Dataset()
+
+        subject_id = subject_dataset["id"]
+        object_id = object_dataset["id"]
+        relation_type = "related_to"
+
+        result = call_action(
+            "relationship_relation_create",
+            {"ignore_auth": True},
+            subject_id=subject_id,
+            object_id=object_id,
+            relation_type=relation_type,
+        )
+
+        assert "created_at" in result[0]
+        assert "created_at" in result[1]
+
+    def test_extras(self):
+        subject_dataset = factories.Dataset()
+        object_dataset = factories.Dataset()
+
+        subject_id = subject_dataset["id"]
+        object_id = object_dataset["id"]
+        relation_type = "related_to"
+        extras = {"key": "value"}
+
+        result = call_action(
+            "relationship_relation_create",
+            {"ignore_auth": True},
+            subject_id=subject_id,
+            object_id=object_id,
+            relation_type=relation_type,
+            extras=extras,
+        )
+
+        assert result[0]["extras"] == extras
+        assert result[1]["extras"] == extras
+
 
 @pytest.mark.usefixtures("clean_db")
 class TestRelationDelete:
diff --git a/ckanext/relationship/tests/package_with_relationship.yaml b/ckanext/relationship/tests/package_with_relationship.yaml
index 64dc5a3..df2262e 100644
--- a/ckanext/relationship/tests/package_with_relationship.yaml
+++ b/ckanext/relationship/tests/package_with_relationship.yaml
@@ -1,14 +1,28 @@
 scheming_version: 1
-dataset_type: package_with_relationship
+dataset_type: package-with-relationship
 about_url: http://github.com/ckan/ckanext-relationship
 
 dataset_fields:
+  - field_name: title
+    label: Title
+    preset: title
+
+  - field_name: name
+    label: URL
+    preset: dataset_slug
+
+  - field_name: owner_org
+    label: Organization
+    preset: dataset_organization
+
   - field_name: related_packages
+    preset: related_entity
+    label: Related Packages
     validators: relationship_related_entity
     current_entity: package
-    current_entity_type: package_with_relationship
+    current_entity_type: package-with-relationship
     related_entity: package
-    related_entity_type: package_with_relationship
+    related_entity_type: package-with-relationship
     relation_type: related_to
 
 resource_fields:
diff --git a/test.ini b/test.ini
index 3c24f68..1f611f7 100644
--- a/test.ini
+++ b/test.ini
@@ -15,6 +15,10 @@ ckan.plugins = scheming_datasets
 scheming.dataset_schemas =
                          ckanext.relationship.tests:package_with_relationship.yaml
 
+scheming.presets =
+                 ckanext.relationship:presets.yaml
+                 ckanext.scheming:presets.json
+
 # Logging configuration
 [loggers]
 keys = root, ckan, sqlalchemy