serif::dimensions::Acceleration serif::dimensions::PhysicalQuantity dimensions.hpp std::string_view std::string_view serif::dimensions::Acceleration::identifier identifier serif::dimensions::Acceleration::identifier = "acceleration" Dimension of Acceleration. serif::dimensions::Acceleration serif::dimensions::PhysicalQuantity serif::dimensions::Acceleration identifier serif::dimensions::PhysicalQuantity std::basic_string_view< Char > std::string_view serif::dimensions::Accelerationidentifier