diff --git a/converters/dbt/src/ossie_dbt/cli.py b/converters/dbt/src/ossie_dbt/cli.py
index 8d71faad..96509f00 100644
--- a/converters/dbt/src/ossie_dbt/cli.py
+++ b/converters/dbt/src/ossie_dbt/cli.py
@@ -67,6 +67,21 @@ def _cmd_msi_to_osi(args: argparse.Namespace) -> None:
     print(f"Written to {output_path}", file=sys.stderr)
 
 
+def safe_model_dump(obj, **kwargs):
+    """compatible pydantic v1 和 v2"""
+    if hasattr(obj, 'model_dump_json'):
+        return obj.model_dump_json(**kwargs)
+    elif hasattr(obj, 'json'):
+        return obj.json(**kwargs)
+    elif hasattr(obj, 'dict'):
+        # Pydantic v1
+        return json.dumps(obj.dict(**kwargs), indent=kwargs.get('indent', 2))
+    elif hasattr(obj, 'model_dump'):
+        # Pydantic v2
+        return json.dumps(obj.model_dump(**kwargs), indent=kwargs.get('indent', 2))
+    else:
+        return json.dumps(obj.__dict__, indent=kwargs.get('indent', 2))
+    
 def _cmd_osi_to_msi(args: argparse.Namespace) -> None:
     input_path = Path(args.input)
     output_path = Path(args.output)
@@ -75,7 +90,13 @@ def _cmd_osi_to_msi(args: argparse.Namespace) -> None:
     document = OSIDocument.model_validate(raw)
     result = OSIToMSIConverter().convert(document)
 
-    output_path.write_text(result.output.model_dump_json(by_alias=True, exclude_none=True, indent=2))
+    json_output = safe_model_dump(
+        result.output, 
+        by_alias=True, 
+        exclude_none=True, 
+        indent=2
+)
+    output_path.write_text(json_output)
     print(f"Written to {output_path}", file=sys.stderr)
 
 
diff --git a/examples/flights.yaml b/examples/flights.yaml
index 803ff73d..1f10c210 100644
--- a/examples/flights.yaml
+++ b/examples/flights.yaml
@@ -537,10 +537,8 @@ ontology:
     - '{Route} connects to departure- {Airport}'    # The hyphen after "departure" has significance when verbalizing constraints
     multiplicity: ManyToOne                         # Each Route connects to at most one departure Airport
     requires: [ 'NOT Route.destination(Airport)' ]
-ontology_mappings:
-- name: flights_mapping
-  semantic_model:
-    name: Flights semantic model
+semantic_model:
+  - name: Flights semantic model
     datasets:
     - name: RUNWAY
       source: DATABASE.SCHEMA.RUNWAYS
@@ -821,6 +819,9 @@ ontology_mappings:
           dialects:
           - dialect: ANSI_SQL
             expression: name
+
+ontology_mappings:
+- name: flights_mapping
   concept_mappings:
   - concept: Runway
     object_mappings: