cqm-source-of-truth-96715b88d1cef87c.yaml

---
features:
  - |
    Add ``QuadraticModel.add_quadratic_from()`` method.
  - |
    Add ``QuadraticModel.add_linear_from()`` method.
  - |
    Add ``ConstrainedQuadraticModel.lower_bound()`` and
    ``ConstrainedQuadraticModel.upper_bound()`` methods.
upgrade:
  - |
    ``QuadraticModel.objective`` is now always a ``QuadraticModel``. Previously
    it could either be a ``BinaryQuadraticModel`` or a ``QuadraticModel``.
  - |
    ``QuadraticModel.objective`` now contains all variables in the constrained
    quadratic model. Previously it could contain a subset of the variables.
deprecations:
  - |
    Deprecate ``ConstrainedQuadraticModel.variables.vartypes``,
    ``ConstrainedQuadraticModel.variables.lower_bounds``, and
    ``ConstrainedQuadraticModel.variables.upper_bounds`` attributes.
  - |
    Deprecate ``ConstrainedQuadraticModel.variables.vartype()`` method.