# daf_relation
[](https://pypi.org/project/lsst-daf-relation/)
[](https://codecov.io/gh/lsst/daf_relation)
`daf_relation` is a package in the [LSST Science Pipelines](https://pipelines.lsst.io).
This package provides classes that represent relational algebra expression trees, along with algorithms to convert them to SQLAlchemy objects and Python generators.
PyPI: [lsst-daf-relation](https://pypi.org/project/lsst-daf-relation/)
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