[Zope] STX: References on an HTML page with

Hi, is this the list to ask STX question? Anyway, I've read on http://www.zope.org/Members/millejoh/structuredText that [a12] is interpreted as <a href="#a12">[12]</a> Unfortunately when I look into the pagesource of one of my sites, I see, hat [a12] is interpreted as <a href="#refa12">[12]</a> What's wrong with STX? Have I done anything wrong? I appreciate any help. regards Lars