/span></code></div><div class="spec-doc"><p>Add the offset list to an expression</p></div></div><div class="odoc-spec"><div class="spec value" id="val-sigma_to_sigma_ne" class="anchored"><a href="#val-sigma_to_sigma_ne" class="anchor"></a><code><span><span class="keyword">val</span> sigma_to_sigma_ne : <span><span><a href="#type-hpred">hpred</a> list</span> <span class="arrow">&#45;&gt;</span></span> <span><span>(<span><a href="#type-atom">atom</a> list</span> * <span><a href="#type-hpred">hpred</a> list</s