lass="sd">            | Specifies the type of input: </span>
<span class="sd">            |     tristimulus values or spectral data for the forward mode.</span>
<span class="sd">        :direction:</span>
<span class="sd">            | &#39;forward&#39; or &#39;inverse&#39;, optional</span>
<span class="sd">            |   -&#39;forward&#39;: xyz -&gt; cam18sl</span>
<span class="sd">            |   -&#39;inverse&#39;: cam18sl -&gt; xyz </span>
<span class="sd">        :outin:</span>
<span class="sd">      