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11 of 11 people found the following review helpful:
5.0 out of 5 stars
Good coverage, up-to-date, very userful, March 1, 2002
This is the best VoiceXML book I've seen. Most VoiceXML books try to do too much: talk about voice hardware, telephony, the history of voice, tts, as well as be a VoiceXML reference. The weakness of these books is that one or more of these sections reveals that the authors do not really command the knowledge needed to make these sections useful. This book also attempts to do these things, but for the most part is able to carry it off.If you're looking for a reference, this is the book to get. The reference section is current VoiceXML 2.0 (October 2001), which is an advantage in and of itself. But the real strength of the reference section is its depth. Each element, (e.g., <assign>, <grammar>, <filled>) has an entry for syntax (how to invoke the element), a description (what the element is used for), a thorough discussion of its attributes (that is, a description of the attribute), a usage statement (the elements parents and children), and an example (a snipet of complete code that uses the element). The examples and discussion of attributes really set this book apart from its peers. There is a brief discussion of the architecture of a VoiceXML app, and a couple of paragraphs discussing the differences between VoiceXML 1.0 and 2.0. The book also gives, contrary to my expectations, a history of the voice industry, a history of VoiceXML, and a discussion of players in the industry. What makes this book's treatment of these topics unusual is that the authors (particularly Kunins, I suspect) actually know these fields. I don't normally want these sections in a reference book (it just adds bulk around the section I really want) but I found them quite compelling here. I learned quite a bit from reading them. The book also contains sections on Dynamic VoiceXML, Security, Voice App Life Cycle, VUI Design, the Future of VoiceXML, and a case study. I haven't read these sections yet, so I can't comment on them. I do know, however, that the sections I have read are sufficiently superior to make this THE VoiceXML book on their own. If I were to criticize the book, I would fault the authors' lavish praise of TellMe (this is minor and not unexpected) and the examples in the reference section. The examples are quite good for someone learning VoiceXML, and the authors are commended for including them. The fault (albeit a minor one) is that they are fairly vanilla. So, while I would have preferred more examples, I concede that such examples would make the book much larger and the inclusion of "advanced" examples to the exclusion of "canonical" examples would have made them less useful to developers learning VoiceXML. Overall, if you are going to own one VoiceXML reference, THIS should be that one.
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