P"&gt;an
efficient HPSG parser&lt;/cons&gt;".

<p>
Each word is bracketed by &lt;tok&gt;.  The attributes "pos" and
"base" represent a part-of-speech and a base form.  "cat" represents
the same information as in &lt;cons&gt;.

<p>
ID numbers (unique in an input file) are assigned to all "cons" and
"tok".  ID numbers are represented with the attribute "id".  The tags
"cons" include the attributes "head", which represent the syntactic
head daughter of the phrase.  "sem_head" represents the semantic head
of th