Instruct: Classify Amazon reviews into positive or negative sentiment
Query: More than just a pocket reference

I thought that I would just give the bottom line on this great little XML Pocket Reference by Oreilly. This book is a perfect quick read for getting yourself up and running on XML as well as being a good quick reference. I bought the book expecting it to only be useful when looking up a XML term while programming and was pleasantly surprised to find that it doubled as a (bare minimum) tutorial for XML. This is a great and inexpensive book for the expert needing a reference guide that is easy to carry around as well as for a beginner that just wants to read a quick and uncomplicated guide to XML.