Vega
Copyright (c) 2026 The Vega Authors

This product is licensed under the MIT License (see LICENSE).

Vega is not affiliated with, endorsed by, or sponsored by the Apache Software
Foundation or the Apache Spark project. "Apache Spark", "Spark", and "PySpark"
are trademarks of the Apache Software Foundation. Vega provides a Spark-like
API for familiarity and compatibility testing only.

--------------------------------------------------------------------------------
Third-party components
--------------------------------------------------------------------------------

This repository's tooling fetches and/or builds against the following
third-party software. These components are NOT part of Vega and retain their
own licenses.

1. Apache Spark
   - Used by: PySpark compatibility tests under scripts/pyspark_compat and the
     vendored/fetched sources under third_party/spark (fetched via
     scripts/fetch_spark_tests.sh; not required to build or run Vega).
   - License: Apache License 2.0
   - https://github.com/apache/spark
   - When distributing any portion of Apache Spark sources, you must comply
     with the Apache License 2.0, including its NOTICE file
     (third_party/spark/LICENSE and third_party/spark/NOTICE).

2. pybind11
   - Used by: vega_server (embedded Python).
   - License: BSD-3-Clause
   - https://github.com/pybind/pybind11

3. GoogleTest
   - Used by: C++ test suite.
   - License: BSD-3-Clause
   - https://github.com/google/googletest

4. cloudpickle
   - Used by: PyVega client (runtime dependency).
   - License: BSD-3-Clause
   - https://github.com/cloudpipe/cloudpickle
