UFL (Unified Form Language) is a unified language for definition of variational forms intended for finite element discretization. More precisely, it defines a fixed interface for choosing finite element spaces and defining expressions for weak forms in a notation close to mathematical notation. The form compilers FFC and SyFi use UFL as their end-user interface, producing UFC implementations as their output.

This package installs the legacy (2022) library for Python 3 used by the legacy FEniCS packages ffc and dolfin. The python package is renamed ufl_legacy rather than ufl.