[Zope] Draft howto - Using Keyword Indexes in ZCatalogs

Hello, I uploaded a draft howto about keyword indexes. It describes how to use the new "Keyword" index type in a simple keyword search form. (This new index type is available in ZCatalogs since Zope 2.1b1.) You can read it here: <http://www.zope.org/Members/AlexR/KeywordIndexes/>. Feel free to send me your feedback. Cheers. Alexandre