EOS

The EMPIRE Ontology System (EOS) is a stateful microservice through which EMPIRE determines which artifacts in an Integrated Project Model (IPM) motivate the existence of other, new artifacts. An ontology stack called the Unified Ontologies Suite features classes and inter-class relationships which are codified as data structures and conditional logic. Ontological class instances are fed into EOS, and new ontological class instances are output from EOS with a semantic relation. EOS queries can be one class in/one class out, one class in/multiple classes out, multiple classes in/one class out, multiple classes in/multiple classes out, and some EOS query outputs are underconstrained such that EOS understands one class from a set of options must exist but doesn't have enough information to select an option. In the latter case, the EMPIRE user is prompted to select from the set of options.