feat: add JSONMetadata

raillabel/json_format/metadata.py

@@ -0,0 +1,33 @@
+# Copyright DB InfraGO AG and contributors
+# SPDX-License-Identifier: Apache-2.0
+
+from __future__ import annotations
+
+from typing import Literal
+
+from pydantic import BaseModel
+
+
+class JSONMetadata(BaseModel):
+    """Metadata about the annotation file itself."""
+
+    schema_version: Literal["1.0.0"]
+    "Version number of the OpenLABEL schema this annotation file follows."
+
+    name: str | None
+    "Name of the OpenLABEL annotation content."
+
+    subschema_version: str | None
+    "Version number of the RailLabel subschema this annotation file follows."
+
+    exporter_version: str | None
+    "Version identifyer of the exporter software."
+
+    file_version: str | None
+    "Version number of the OpenLABEL annotation content."
+
+    tagged_file: str | None
+    "File name or URI of the data file being tagged."
+
+    comment: str | None
+    "Additional information or description about the annotation content."