Switch default values for additional_* flags

docs/source/user_guide_kg_builder.rst

@@ -998,31 +998,40 @@ By default, all extracted elements — including nodes, relationships, and prope
 Configuration Options
 ---------------------
 
-- **Required Properties**
+- **Required Properties** (default: ``False``)
   Required properties may be specified at the node or relationship type level. Any extracted node or relationship missing one or more of its required properties will be pruned from the graph.
 
-- **Additional Properties** *(default: True)*
+- **Additional Properties**
   This node- or relationship-level option determines whether extra properties not listed in the schema should be retained.
 
-   - If set to ``True`` (default), all extracted properties are retained.
+   - If set to ``True``, all extracted properties are retained.
    - If set to ``False``, only the properties defined in the schema are preserved; all others are removed.
 
+.. note:: Default behavior
+
+    By default, this flag is set to ``False`` if at least one property is defined, ``True`` otherwise.
+
+    The same rule applies for `additional_node_types`, `additional_relationship_types` and `additional_patterns` described below.
+
+.. warning::
+
+    Defining a node or relationship types with no properties and `additional_properties_allowed=False` will raise a ValidationError.
 
 .. note:: Node pruning
 
    If, after property pruning using the above rule, a node is left without any property, it is removed from the graph.
 
 
-- **Additional Node Types** *(default: True)*
+- **Additional Node Types**
   This schema-level option specifies whether node types not defined in the schema are included in the graph.
 
-   - If set to ``True`` (default), such node types are retained.
+   - If set to ``True``, such node types are retained.
    - If set to ``False``, nodes with undefined types are removed.
 
-- **Additional Relationship Types** *(default: True)*
+- **Additional Relationship Types**
   This schema-level option specifies whether relationship types not defined in the schema are included in the graph.
 
-   - If set to ``True`` (default), such relationships are retained.
+   - If set to ``True``, such relationships are retained.
    - If set to ``False``, relationships with undefined types are removed.
 
 - **Additional Patterns** *(default: True)*

examples/customize/build_graph/components/pruners/graph_pruner.py

@@ -41,7 +41,7 @@
         Neo4jNode(
             id="Organization/Corp1",
             label="Organization",
-            properties={"name": "CorpA"},
+            properties={"name": "Corp1"},
         ),
     ],
     relationships=[
@@ -51,7 +51,7 @@
             type="KNOWS",
         ),
         Neo4jRelationship(
-            start_node_id="Organization/CorpA",
+            start_node_id="Organization/Corp2",
             end_node_id="Person/Jack",
             type="WORKS_FOR",
         ),
@@ -80,12 +80,14 @@
                 PropertyType(name="name", type="STRING", required=True),
                 PropertyType(name="address", type="STRING"),
             ],
+            additional_properties=True,
         ),
     ),
     relationship_types=(
         RelationshipType(
             label="WORKS_FOR",
             properties=[PropertyType(name="since", type="LOCAL_DATETIME")],
+            additional_properties=True,
         ),
         RelationshipType(
             label="KNOWS",

src/neo4j_graphrag/experimental/components/schema.py

@@ -17,7 +17,7 @@
 import json
 import logging
 import warnings
-from typing import Any, Dict, List, Literal, Optional, Tuple, Union, Sequence
+from typing import Any, Dict, List, Literal, Optional, Tuple, Union, Sequence, Callable
 from pathlib import Path
 
 from pydantic import (
@@ -27,6 +27,7 @@
     validate_call,
     ConfigDict,
     ValidationError,
+    Field,
 )
 from typing_extensions import Self
 
@@ -74,6 +75,13 @@ class PropertyType(BaseModel):
     )
 
 
+def default_additional_item(key: str) -> Callable[[dict[str, Any]], bool]:
+    def wrapper(validated_data: dict[str, Any]) -> bool:
+        return len(validated_data.get(key, [])) == 0
+
+    return wrapper
+
+
 class NodeType(BaseModel):
     """
     Represents a possible node in the graph.
@@ -82,7 +90,9 @@ class NodeType(BaseModel):
     label: str
     description: str = ""
     properties: list[PropertyType] = []
-    additional_properties: bool = True
+    additional_properties: bool = Field(
+        default_factory=default_additional_item("properties")
+    )
 
     @model_validator(mode="before")
     @classmethod
@@ -96,7 +106,8 @@ def validate_additional_properties(self) -> Self:
         if len(self.properties) == 0 and not self.additional_properties:
             raise ValueError(
                 "Using `additional_properties=False` with no defined "
-                "properties will cause the model to be pruned during graph cleaning.",
+                "properties will cause the model to be pruned during graph cleaning. "
+                f"Define some properties or remove this NodeType: {self}"
             )
         return self
 
@@ -109,7 +120,9 @@ class RelationshipType(BaseModel):
     label: str
     description: str = ""
     properties: list[PropertyType] = []
-    additional_properties: bool = True
+    additional_properties: bool = Field(
+        default_factory=default_additional_item("properties")
+    )
 
     @model_validator(mode="before")
     @classmethod
@@ -123,7 +136,8 @@ def validate_additional_properties(self) -> Self:
         if len(self.properties) == 0 and not self.additional_properties:
             raise ValueError(
                 "Using `additional_properties=False` with no defined "
-                "properties will cause the model to be pruned during graph cleaning.",
+                "properties will cause the model to be pruned during graph cleaning. "
+                f"Define some properties or remove this RelationshipType: {self}"
             )
         return self
 
@@ -145,9 +159,15 @@ class GraphSchema(DataModel):
     relationship_types: Tuple[RelationshipType, ...] = tuple()
     patterns: Tuple[Tuple[str, str, str], ...] = tuple()
 
-    additional_node_types: bool = True
-    additional_relationship_types: bool = True
-    additional_patterns: bool = True
+    additional_node_types: bool = Field(
+        default_factory=default_additional_item("node_types")
+    )
+    additional_relationship_types: bool = Field(
+        default_factory=default_additional_item("relationship_types")
+    )
+    additional_patterns: bool = Field(
+        default_factory=default_additional_item("patterns")
+    )
 
     _node_type_index: dict[str, NodeType] = PrivateAttr()
     _relationship_type_index: dict[str, RelationshipType] = PrivateAttr()

tests/e2e/experimental/test_graph_pruning_component_e2e.py

@@ -119,6 +119,7 @@ async def test_graph_pruning_loose(extracted_graph: Neo4jGraph) -> None:
                     {"name": "name", "type": "STRING"},
                     {"name": "height", "type": "INTEGER"},
                 ],
+                "additional_properties": True,
             }
         ],
         "relationship_types": [
@@ -129,6 +130,9 @@ async def test_graph_pruning_loose(extracted_graph: Neo4jGraph) -> None:
         "patterns": [
             ("Person", "KNOWS", "Person"),
         ],
+        "additional_node_types": True,
+        "additional_relationship_types": True,
+        "additional_patterns": True,
     }
     await _test(extracted_graph, schema_dict, extracted_graph)
 
@@ -153,6 +157,7 @@ async def test_graph_pruning_missing_required_property(
                     },
                     {"name": "height", "type": "INTEGER"},
                 ],
+                "additional_properties": True,
             }
         ],
         "relationship_types": [
@@ -163,6 +168,9 @@ async def test_graph_pruning_missing_required_property(
         "patterns": [
             ("Person", "KNOWS", "Person"),
         ],
+        "additional_node_types": True,
+        "additional_relationship_types": True,
+        "additional_patterns": True,
     }
     filtered_graph = Neo4jGraph(
         nodes=[
@@ -253,7 +261,7 @@ async def test_graph_pruning_strict_properties_and_node_types(
                     },
                     {"name": "height", "type": "INTEGER"},
                 ],
-                "additional_properties": False,
+                # "additional_properties": False,  # default value
             }
         ],
         "relationship_types": [
@@ -264,7 +272,9 @@ async def test_graph_pruning_strict_properties_and_node_types(
         "patterns": [
             ("Person", "KNOWS", "Person"),
         ],
-        "additional_node_types": False,
+        # "additional_node_types": False,  # default value
+        "additional_relationship_types": True,
+        "additional_patterns": True,
     }
     filtered_graph = Neo4jGraph(
         nodes=[
@@ -354,6 +364,7 @@ async def test_graph_pruning_strict_patterns(extracted_graph: Neo4jGraph) -> Non
                     },
                     {"name": "height", "type": "INTEGER"},
                 ],
+                "additional_properties": True,
             },
             {
                 "label": "Organization",
@@ -371,6 +382,7 @@ async def test_graph_pruning_strict_patterns(extracted_graph: Neo4jGraph) -> Non
             ("Person", "KNOWS", "Person"),
             ("Person", "KNOWS", "Organization"),
         ),
+        "additional_node_types": True,
         "additional_relationship_types": False,
         "additional_patterns": False,
     }

tests/e2e/experimental/test_simplekgpipeline_e2e.py

@@ -96,13 +96,13 @@ async def test_pipeline_builder_happy_path_legacy_schema(
     ]
 
     # Instantiate Entity and Relation objects
-    entities = ["PERSON", "ORGANIZATION", "HORCRUX", "LOCATION"]
+    entities = ["Person", "Organization", "Horcrux", "Location"]
     relations = ["SITUATED_AT", "INTERACTS", "OWNS", "LED_BY"]
     potential_schema = [
-        ("PERSON", "SITUATED_AT", "LOCATION"),
-        ("PERSON", "INTERACTS", "PERSON"),
-        ("PERSON", "OWNS", "HORCRUX"),
-        ("ORGANIZATION", "LED_BY", "PERSON"),
+        ("Person", "SITUATED_AT", "Location"),
+        ("Person", "INTERACTS", "Person"),
+        ("Person", "OWNS", "Horcrux"),
+        ("Organization", "LED_BY", "Person"),
     ]
 
     # Additional arguments