title: Acknowledgements in an R package
body: <p>In a package, I want to aknowledge someone's intellectual help, who has writen no code.
  The question is about the best way to credit this help, as I don't find a role of persons who fits with this case.</p>
  
  <p>In <code>?person</code>, and <a href="https://journal.r-project.org/archive/2012-1/RJournal_2012-1_Hornik~et~al.pdf" rel="nofollow noreferrer">"Who Did What" (The R Journal)</a> the person's role closer to what I am looking for are:</p>
  
  <blockquote>
    <p>"ctb" (Contributor): Authors who have made smaller contributions (such as code patches, etc) ...</p>
    
    <p>"ths" (Thesis advisor): Thesis advisor ...</p>
  </blockquote>
  
  <p>But the person whose help I want to aknowledge has writen no code, and this is not a thesis</p>
  
  <p>The answer has came from the <a href="https://www.loc.gov/marc/relators/relaterm.html" rel="nofollow noreferrer">link</a> provided by @Axeman with the full list of roles:</p>
  
  <blockquote>
    <p><strong>Consultant</strong> [csl]
    A person or organization relevant to a resource, who is called upon for professional advice or services in a specialized field of knowledge or training</p>
    
    <p><strong>Consultant to a project</strong> [csp]
    A person or organization relevant to a resource, who is engaged specifically to provide an intellectual overview of a strategic or operational task and by analysis, specification, or instruction, to create or propose a cost-effective course of action or solution</p>
  </blockquote>
  
  <p>The question has been put on hold, if it is reopen I would like @Axeman to make his comment as an answer, to accept it. </p>
  
  <p>If it is considered proper by someone with enough reputation, it could be tagged as persons, credit or attribution.</p>
  
  <p>Regards.</p>