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XPath and XPointer: Locating Content in XML Documents (Paperback)

by John Simpson (Author)

3.0 out of 5 stars See all reviews (3 customer reviews)

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Product details

Paperback: 208 pages
Publisher: O'Reilly Media, Inc. (31 Jul 2002)
Language English
ISBN-10: 0596002912
ISBN-13: 978-0596002916
Product Dimensions: 23 x 17.6 x 1.2 cm

Average Customer Review: 3.0 out of 5 stars See all reviews (3 customer reviews)

Amazon.co.uk Sales Rank: 460,853 in Books (See Bestsellers in Books)
Popular in these categories:
#7 in Books > Computing & Internet > Programming > Languages > XML > XPath, XPointer & XLink
#13 in Books > Computing & Internet > Programming > Languages > XML > XML & Databases

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Product Description

Referring to specific information inside an XML document is a little like finding a needle in a haystack: how do you differentiate the information you need from everything else? XPath and XPointer are two closely related languages that play a key role in XML processing by allowing developers to find these needles and manipulate embedded information. XPath describes a route for finding specific items by defining a path through the hierarchy of an XML document, abstracting only the information that's relevant for identifying the data. XPointer extends XPath to identify more complex parts of documents. The two technologies are critical for developers seeking needles in haystacks in various types of processing. "XPath and XPointer" fills an essential need for XML developers by focusing directly on a critical topic that has been covered only briefly. The book offers practical knowledge of the two languages that underpin XML, XSLT and XLink. XPath and XPointer cuts through basic theory and provides real-world examples that you can use right away. Written for XML and XSLT developers and anyone else who needs to address information in XML documents, the book assumes a working knowledge of XML and XSLT. It begins with an introduction to XPath basics. You'll learn about location steps and paths, XPath functions and numeric operators. Once you've covered XPath in depth, you'll move on to XPointer - its background, syntax, and forms of addressing. By the time you've finished the book, you'll know how to construct a full XPointer (one that uses an XPath location path to address document content) and completely understand both the XPath and XPointer features it uses. "XPath and XPointer" contains material on the forthcoming XPath 2.0 spec and EXSLT extensions, as well as versions 1.0 of both XPath and XPointer.

From the Publisher

Referring to specific information inside an XML document is a little like finding a needle in a haystack. XPath and XPointer are two closely related languages that play a key role in XML processing by allowing developers to find these needles and manipulate embedded information. By the time you've finished XPath and XPointer, you'll know how to construct a full XPointer (one that uses an XPath location path to address document content) and completely understand both the XPath and XPointer features it uses.

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Customer Reviews

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16 of 17 people found the following review helpful:

3.0 out of 5 stars A good book - if you need that level of detail!, 3 Mar 2003

By	"jonesgth" - See all my reviews

On the whole, this is a well-researched and well-written book, although the chapters on XPointer could do with more concrete examples of how XPointer could be used, and also more clarity in places. The chapters on XPath are good, but are marred by two things. Firstly, the level of uncertainty about the details of the impending XPath 2.0 specification. And secondly, the function reference is not as good as it could be. The material on nodes, node-sets, location steps, paths and axes is excellent. However, before buying this book, you would be advised to check that the information you need is not covered elsewhere. For example, if you're interested in XSLT, then the level of XPAth detail in 'XSLT' by Doug Tidwell is probably enough. Oddly, the function reference in Tidwell's book is superior to Simpson's.

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7 of 9 people found the following review helpful:

1.0 out of 5 stars Lots of room for improvement, 5 May 2005

By A Customer

I've been working with this book for a couple of weeks now and have to say that I am really disappointed. It's way too concept-heavy and there are nowhere near enough examples. The examples there are given are too general.

Looking at how thin this book is makes me wonder whether its existence is a calculated effort to rip off developers interested in learning more about the subject. I could have learned all this book has to say about XPath and XPointer concepts from reading various tutorials on the web.

The book has the feel of being slapped together quickly in an effort to rush it to market, which is a pity because it has lots of potential. The index in particular is extremely poor. I've lost count of how many times I've tried to look something up that I know I've read in the book but is not in the index.

Simpson can write, but he has the unfortunate tendency to use absurd sentences like "Don't fret; there are more detailed examples aplenty throughout the rest of the book", which, besides being untrue, leaves one with the feeling being lectured by a cowboy.

Save your money, I wish I had.

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5.0 out of 5 stars Excellent for XPath 1.0, 13 Sep 2007

By	Beard (Hants, UK) - See all my reviews

Like reviewer "A reader", I've been working with this book for a couple of weeks now, but unlike that reviewer I can say I'm VERY happy with this book.

I needed some detailed explanations about XPath 1.0 as I'm using Vbscript & Microsoft's DOM implementation (Microsoft do not yet support XPath 2.0).. I've been through 5 other books & countless web pages seeking a proper understanding and some examples of what's possible, without much success.. until I read chapters 1 - 5 of this book (ch6 is XPath 2.0, the remainder is XPointer). Worth every penny!

I could not agree with the previous reviewer less.. the book is well written, has plenty of easy to follow examples, is very thorough, and definitely does NOT feel like a "calculated effort to rip off developers".

I as so glad I decided to ignore the reviews in this case and buy the book anyway.

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