The version 1.0 OWL file (in rdf/xml) that is currently served when URIs are dereferenced is at http://purl.org/dsw/ and in the 1.0 release, http://dx.doi.org/10.5281/zenodo.46972.
The next version under development (1.1) is here.
The Darwin-SW documentation is located in the dsw repository wiki, which can be accessed by clicking here.
Read the Semantic Web Journal article about Darwin-SW by clicking here.
Click here to download this diagram as a poster-sized PowerPoint slide (43 kb)