 Similarly, Scott Tanona (2004) rejects the view that Bohr’s correspondence principle is about an asymptotic agreement of quantum and classical theories. He argues instead that Bohr’s correspondence principle should be understood primarily as a connection between spectra (radiation) and orbital motion. More broadly, Tanona argues that the correspondence principle should not be understood as a heuristic tool for theory construction, but rather as an epistemological tool, whose “main purpose within Bohr’s empirical approach was to bridge the epistemological gap between empirical phenomena and the unknown atomic structure … by associating classical properties of spectra with atomic properties” (Tanona 2004, p. 683).