">const</span> = 0;
<a name="l00287"></a>00287 
<a name="l00288"></a>00288   <span class="comment">// return transition feature vector of [j-th tag at i-th token] to</span>
<a name="l00289"></a>00289   <span class="comment">// [k-th tag at(i-1)-th token]</span>
<a name="l00290"></a>00290   <span class="keyword">virtual</span> <span class="keyword">const</span> <span class="keywordtype">int</span>* prev_transition_vector(<span class="keywordtype">size_t</span> i,
<a name="l00291"></a>00291                   