s="preprocessor"></span>  <span class="comment">// return emission feature vector of the j-th tag at i-th token</span>
<a name="l00281"></a>00281   <span class="keyword">virtual</span> <span class="keyword">const</span> <span class="keywordtype">int</span>* emission_vector(<span class="keywordtype">size_t</span> i, <span class="keywordtype">size_t</span> j) <span class="keyword">const</span> = 0;
<a name="l00282"></a>00282 
<a name="l00283"></a>00283   <span class="comment">// return transition feature vect