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from __future__ import annotations
from typing import List, Union
from langchain_core.documents import Document
from langchain_core.load.serializable import Serializable
from langchain_core.pydantic_v1 import Field
class Node(Serializable):
"""Represents a node in a graph with associated properties.
Attributes:
id (Union[str, int]): A unique identifier for the node.
type (str): The type or label of the node, default is "Node".
properties (dict): Additional properties and metadata associated with the node.
"""
id: Union[str, int]
type: str = "Node"
properties: dict = Field(default_factory=dict)
class Relationship(Serializable):
"""Represents a directed relationship between two nodes in a graph.
Attributes:
source (Node): The source node of the relationship.
target (Node): The target node of the relationship.
type (str): The type of the relationship.
properties (dict): Additional properties associated with the relationship.
"""
source: Node
target: Node
type: str
properties: dict = Field(default_factory=dict)
class GraphDocument(Serializable):
"""Represents a graph document consisting of nodes and relationships.
Attributes:
nodes (List[Node]): A list of nodes in the graph.
relationships (List[Relationship]): A list of relationships in the graph.
source (Document): The document from which the graph information is derived.
"""
nodes: List[Node]
relationships: List[Relationship]
source: Document
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