Instruct: Classify a review into positive or negative sentiment.
Query: Poorly conceived and useless

This book has nothing to ofer. If you need some pointers on creating XSL style sheets then keep looking. There is no one practical example even for basic stuff like using variable and parameters for sorting and filtering. Most examples are of the form:xsl:choosexsl:when test='expr1' somethingso if you whant to know how to build 'expr1' you need another book.After spending the money and time I had to go to the www.w3c.org site and obtain the information.