italics </I> refer to field names. 
 Characters or strings in <B>boldface </B> represent an actual character or string 
as it appears in the file. Items enclosed in italicized square brackets 
(<I>[ ] </I>) may not be present. Since several files contain fields that have 
the identical meaning, field names are consistently defined.  For example, 
several WordNet files contain one or more <I>synset_offset </I> fields.  In each 
case, the definition of <I>synset_offset </I> is identical.  
<H2><A NAME="sect4"