title: In an ontology, how to define a property's value as a datetime
body: <p>When writing an ontology and you want to create a class and property relating to a time/date, I assume that you'll have something structurally like this <em>(psuedo code)</em>:</p>
  
  <pre><code>class:Project
    label: Project
  
  property:duedate
    label: The expected completion time and date of project
    domain: Project
    range: datetime (?)
  </code></pre>
  
  <p>i've googled around and found the <a href="http://www.isi.edu/~hobbs/owl-time.html" rel="noreferrer">Owl-Time</a> ontology, but the <a href="http://www.isi.edu/~hobbs/damltime/time-entry-case1.owl" rel="noreferrer">use case</a> is confusing to me because it looks like I'm supposed to define quite a few things. Am I on the right track here?</p>