> is similar to - but faster than - <code>db</code>, because it
can use a single tree access. See also <code><a
href="refD.html#db">db</a></code>, <code><a
href="refC.html#collect">collect</a></code>, <code><a
href="refF.html#fetch">fetch</a></code>, <code><a
href="refI.html#init">init</a></code>, <code><a
href="refS.html#step">step</a></code> and <code><a
href="refA.html#+Aux">+Aux</a></code>.

<pre>
(class +PS +Entity)
(rel par (+Dep +Joint) (sup) ps (+Part))        # Part
(rel sup (+Aux +Ref +Link) (par)