  We develop a systematic approach for constructing symmetry-based indicators
of a topological classification for superconducting systems. The topological
invariants constructed in this work form a complete set of symmetry-based
indicators that can be computed from knowledge of the Bogoliubov-de Gennes
Hamiltonian on high-symmetry points in Brillouin zone. After excluding
topological invariants corresponding to the phases without boundary signatures,
we arrive at natural generalization of symmetry-based indicators [H. C. Po, A.
Vishwanath, and H. Watanabe, Nature Comm. 8, 50 (2017)] to Hamiltonians of
Bogoliubov-de Gennes type.
