tatiana opened a new issue, #51566:
URL: https://github.com/apache/airflow/issues/51566
### Apache Airflow version
3.0.1
### If "Other Airflow 2 version" selected, which one?
_No response_
### What happened?
This DAG is used to run with Airflow 2.9, 2.10 and 2.11:
```
from datetime import datetime
from airflow import DAG
from airflow.datasets import Dataset, DatasetAlias
from airflow import DAG, Dataset
from airflow.models.baseoperator import BaseOperator
from airflow.utils.context import Context
#dataset_alias = DatasetAlias("my_dataset_alias")
dataset_alias = DatasetAlias('source_rendering_dag__ｍｕｌｔｉｂｙｔｅ_run')
dataset = Dataset("something")
class CustomOperator(BaseOperator):
def __init__(self, **kwargs):
kwargs["outlets"] = [dataset_alias]
super().__init__(**kwargs)
def execute(self, context: Context):
context["outlet_events"][DatasetAlias].add(dataset)
with DAG("example_dataset_alias", start_date=datetime(2023, 4, 20)) as dag:
do_something = CustomOperator(task_id="do_something")
do_something
```
When trying it with Airflow 3.0.1 and 3.0.2rc1, however, it raises the
following exception:
```
Timestamp: 2025-06-10, 09:26:26
Traceback (most recent call last):
File
"/Users/tati/Code/cosmos-fresh/astronomer-cosmos/venv-af3/lib/python3.10/site-packages/airflow/sdk/definitions/asset/__init__.py",
line 186, in _validate_non_empty_identifier
if not _validate_identifier(instance, attribute, value):
File
"/Users/tati/Code/cosmos-fresh/astronomer-cosmos/venv-af3/lib/python3.10/site-packages/airflow/sdk/definitions/asset/__init__.py",
line 181, in _validate_identifier
raise ValueError(f"{type(instance).__name__} {attribute.name} must only
consist of ASCII characters")
ValueError: AssetAlias name must only consist of ASCII characters
```
### What you think should happen instead?
Unless there was a good reason for Airflow DatasetAlias to stop supporting
non-ASCII characters, I believe we should make Airflow 3 support it, and no
longer fail when running the example DAG.
### How to reproduce
Shared above.
### Operating System
N/A
### Versions of Apache Airflow Providers
N/A
### Deployment
Other
### Deployment details
N/A
### Anything else?
No
### Are you willing to submit PR?
- [ ] Yes I am willing to submit a PR!
### Code of Conduct
- [x] I agree to follow this project's [Code of
Conduct](https://github.com/apache/airflow/blob/main/CODE_OF_CONDUCT.md)
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