Fig. 2.

The semantic domains covered in the NIFSTD v0.5 OWL ontology. Each of the domains specified within the ovals are covered by a separate OWL module (see Table 1). The umbrella file http://purl.org/nif/ontology/nif.owl imports each of these modules when opened in Protégé. These domains are covered either through import of the corresponding BIRNLex module, a module constructed by NIF or a direct import of an existing ontology (see key for color code). Each of the modules, in turn, may cover multiple subdomains, some of which are shown in the rectangular boxes. NS = nervous system