diff --git a/BuildingOperation/code/code_for_using_pydantic.py b/BuildingOperation/code/code_for_using_pydantic.py
new file mode 100644
index 0000000..6de6294
--- /dev/null
+++ b/BuildingOperation/code/code_for_using_pydantic.py
@@ -0,0 +1,153 @@
+from __future__ import annotations
+
+from enum import Enum
+from typing import List, Optional, Union
+
+from pydantic import AnyUrl, AwareDatetime, BaseModel, Field, constr
+
+
+class Result(Enum):
+    ok = 'ok'
+    aborted = 'aborted'
+
+
+class Status(Enum):
+    cancelled = 'cancelled'
+    finished = 'finished'
+    ongoing = 'ongoing'
+    planned = 'planned'
+    scheduled = 'scheduled'
+
+
+class Type(Enum):
+    BuildingOperation = 'BuildingOperation'
+
+
+class BuildingOperation(BaseModel):
+    alternateName: Optional[str] = Field(
+        None, description='An alternative name for this item'
+    )
+    dataProvider: Optional[str] = Field(
+        None,
+        description='A sequence of characters identifying the provider of the harmonised data entity',
+    )
+    dateCreated: Optional[AwareDatetime] = Field(
+        None,
+        description='Entity creation timestamp. This will usually be allocated by the storage platform',
+    )
+    dateFinished: Optional[AwareDatetime] = Field(
+        None, description='The actual end date for the operation'
+    )
+    dateModified: Optional[AwareDatetime] = Field(
+        None,
+        description='Timestamp of the last modification of the entity. This will usually be allocated by the storage platform',
+    )
+    dateStarted: Optional[AwareDatetime] = Field(
+        None, description='The actual start date for the operation'
+    )
+    description: Optional[str] = Field(None, description='A description of this item')
+    endDate: Optional[AwareDatetime] = Field(
+        None, description='The planned end date for the operation'
+    )
+    id: Optional[
+        Union[
+            constr(
+                pattern=r'^[\\w\\-\\.\\{\\}\\$\\+\\*\\[\\]`|~^@!, :\\\\]+$',
+                min_length=1,
+                max_length=256,
+            ),
+            AnyUrl,
+        ]
+    ] = Field(None, description='Unique identifier of the entity')
+    name: Optional[str] = Field(None, description='The name of this item')
+    operationSequence: Optional[List[str]] = Field(
+        None, description='Id of the sequence of the operation when available'
+    )
+    operationType: Optional[str] = Field(
+        None, description='Type of the operation on the building'
+    )
+    owner: Optional[
+        List[
+            Union[
+                constr(
+                    pattern=r'^[\\w\\-\\.\\{\\}\\$\\+\\*\\[\\]`|~^@!,:\\\\]+$',
+                    min_length=1,
+                    max_length=256,
+                ),
+                AnyUrl,
+            ]
+        ]
+    ] = Field(
+        None,
+        description='A List containing a JSON encoded sequence of characters referencing the unique Ids of the owner(s)',
+    )
+    refBuilding: Optional[
+        Union[
+            constr(
+                pattern=r'^[\\w\\-\\.\\{\\}\\$\\+\\*\\[\\]`|~^@!, :\\\\]+$',
+                min_length=1,
+                max_length=256,
+            ),
+            AnyUrl,
+        ]
+    ] = Field(None, description='Building reference where the operation is performed')
+    refOperator: Optional[
+        Union[
+            constr(
+                pattern=r'^[\\w\\-\\.\\{\\}\\$\\+\\*\\[\\]`|~^@!, :\\\\]+$',
+                min_length=1,
+                max_length=256,
+            ),
+            AnyUrl,
+        ]
+    ] = Field(
+        None,
+        description='Reference to the Operator doing the operation on the building',
+    )
+    refRelatedBuildingOperation: Optional[
+        List[
+            Union[
+                constr(
+                    pattern=r'^[\\w\\-\\.\\{\\}\\$\\+\\*\\[\\]`|~^@!,:\\\\]+$',
+                    min_length=1,
+                    max_length=256,
+                ),
+                AnyUrl,
+            ]
+        ]
+    ] = Field(
+        None, description='Reference to other building operations when in sequence'
+    )
+    refRelatedDeviceOperation: Optional[
+        List[
+            Union[
+                constr(
+                    pattern=r'^[\\w\\-\\.\\{\\}\\$\\+\\*\\[\\]`|~^@!,:\\\\]+$',
+                    min_length=1,
+                    max_length=256,
+                ),
+                AnyUrl,
+            ]
+        ]
+    ] = Field(
+        None,
+        description='Devices related to the current operation. A list of references to an entity of type Device',
+    )
+    result: Optional[Result] = Field(
+        None, description="Result of the building operation. Enum:'ok, aborted'"
+    )
+    seeAlso: Optional[Union[List[AnyUrl], AnyUrl]] = Field(
+        None, description='list of uri pointing to additional resources about the item'
+    )
+    source: Optional[str] = Field(
+        None,
+        description='A sequence of characters giving the original source of the entity data as a URL. Recommended to be the fully qualified domain name of the source provider, or the URL to the source object',
+    )
+    startDate: Optional[AwareDatetime] = Field(
+        None, description='The planned start date for the operation'
+    )
+    status: Optional[Status] = Field(
+        None,
+        description="Status of the operation. Enum:'cancelled, finished, ongoing, planned, scheduled' ",
+    )
+    type: Optional[Type] = Field(None, description='It has to be BuildingOperation')