ment">// [k-th tag at(i-1)-th token]</span>
<a name="l00272"></a>00272   <span class="keyword">virtual</span> <span class="keywordtype">double</span> prev_transition_cost(<span class="keywordtype">size_t</span> i,
<a name="l00273"></a>00273                                       <span class="keywordtype">size_t</span> j, <span class="keywordtype">size_t</span> k) <span class="keyword">const</span> = 0;
<a name="l00274"></a>00274 
<a name="l00275"></a>00275   <span class="comment">//  return the best accumula