title: Graphviz - What is a valid style attribute?
body: <p>The <a href="http://www.graphviz.org/doc/info/attrs.html#d:style" rel="noreferrer">Graphviz attributes documentation</a> describes the style attribute but does not say what values it may hold:</p>
  
  <blockquote>
    <p>Set style information for components of the graph. For cluster
    subgraphs, if style="filled", the cluster box's background is filled.
    If the default style attribute has been set for a component, an
    individual component can use style="" to revert to the normal default.
    For example, if the graph has</p>
  
  <pre><code>edge [style="invis"]
  </code></pre>
    
    <p>making all edges invisible, a specific edge can overrride this via:</p>
  
  <pre><code>a -&gt; b [style=""]
  </code></pre>
    
    <p>Of course, the component can also explicitly set its style attribute
    to the desired value.</p>
  </blockquote>
  
  <p>What is a valid style attribute in Graphviz?</p>