XPath examples and results

SketchPath is an XML XPath (1.0) tool that provides an integrated environment for: viewing XML files, compressed XML packages, developing XPath expressions against them, and managing XPath expressions in file libraries. XPath File libraries are saved and loaded as .NET DataTable XML serialized objects and can therefore be manipulated in turn using XSLT or ADO.NET. The tool is design to assist XSLT developers, but it should be of benefit to any developers or analysts using XPath to extract data from XML, or validate XML with XPath rules Key Features: Colorized XPath Predicate-Aware Auto-Completion of node names/values Namespace Control XSLT Variables XPath Library Files Compatibility with Microsoft Open XML, XPS and OASIS ODF Free Beta Download Available Now

Altova® XMLSpy® contains the powerful XPath Analyzer window and XPath builder, which assist you in building and verifying XPath 1.0 and XPath 2.0 expressions. In the XPath Analyzer window, you simply enter an XPath expression, and XMLSpy displays the results in real time. As you're composing an expression, correct syntax is shown in black, with incorrect entries highlighted in red. Clicking any node in the result window highlights the corresponding node in the file itself. The XPath builder allows you to highlight any node in your document and automatically copy the correct XPath to the clipboard. Both tools allow you to check your XPath expressions quickly and make changes in an intuitive way, saving hours of debugging time.

This tutorial helps you to learn: What is XML Path Language (XPath); Data Types, Literals and Variables; Evaluation Context Build-in Functions; Expressions and Location Paths; Using XPath in XSL Templates.

Editing complex XPath expressions in the XPath toolbar can be sometimes difficult due to the size limitation. This view allows editing of multi-line expressions. The executed expressions are stored in a history list and they can be reused as necessary. The results of an XPath query are shown as a list in the results panel. You can save the results to a file by clicking the Save Results option from the right-click menu or even print the XPath results. Clicking on a result line will highlight the corresponding part from the document.

The XPath processor allows you to retrieve a subset of an XML document. A query, which is always an XPath expression, returns a well-formed XML node-list or an XPath value object. In XPath 2.0, an expression returns a sequence of XML nodes and/or XPath value objects. This XPath tutorial covers the following topics:

About the XPath Processor, Sample Data for Examples and Testing, Getting Started with XPath Queries, Specifying the Nodes to Evaluate, Handling Strings and Text in XPath, Specifying Boolean Expressions and Functions, Specifying Number Operations and Functions, Comparing Values, Generating XPath, Finding a Particular Node, Obtaining a Union, Obtaining Information About a Node or a Node Set, Using XPath Expressions in Stylesheets, Accessing Other Documents During Query Execution, XPath Quick Reference.

Introductory tutorial and a growing list of resources. Subscribe to the RSS feed to stay up to date.

Stylus Studio's XPath Expression Evaluator alows you to visually analyze, test, and debug XPath expressions against any XML instance document or data source. The XPath visualizer and tester works for both XPath 1.0 and XPath 2.0 standards.

Stylus Studio's XPath editor supports XPath code-sensing, and context sensitive, XPath aware auto-completion, XPath syntax coloring and syntax checking for any XPath 1.0/2.0 expression or function.

Stylus Studio's XPath generator to help automate generating XPath expressions. To generate an XPath expression, open an XML document in Tree View. Tree View allows you to quickly expand and collapse the nodes of an XML document. When you've found the XML element or attribute for which you want to construct an XPath expression, just right-click and choose Copy XPath Query to Clipboard from the shortcut menu - you can then paste the XPath expression generated by Stylus Studio into any of Stylus Studio's XML editors.

This XPath tutorial covers: How an XPath processor works, sample data for XPath Examples and Testing, Getting Started with XPath queries, Specifying the XML Nodes to Evaluate, XPath strings and text processing, XPath Expressions and functions, XPath Number Operations and Functions, comparing values in XPath, finding a particular node Obtaining a union, obtaining information About a Node or a node set Using XPath expressions in XSLT stylesheets, accessing other documents During Query execution, and an XPath reference guide.

Download chapter 1 of the "XPath 2.0 Programmers Reference", which covers the following topics: Top-level XPath constructs and the lexical rules for using whitespace and comments, Basic XPath operators for writing arithmetic and Boolean expressions, Three operators for combining the results of path expressions: union, intersect, and except, How XPath 2.0 supports sequences, Where to access a complete listing of all functions in the core function library, How to define the syntax of XPath regular expressions as used in the new functions matches(), replace(), and tokenize(), and much more. Free printable PDF download.

Arpan Desai discusses the DataSetNavigator, which provides the power and flexibility of the XML programming model without the overhead of having to convert the entire DataSet into an XmlDataDocument object.

The W3C (the World Wide Web Consortium, http://www.w3.org) published the XML 1.0 specification on February 10th, 1998. The XML 1.1 specification was published six years later, on February 4th, 2004. In these six years, XML has taken the industry by storm. XML has become the standard for how to describe and exchange data.

I have been snuffling around various Java APIs relating to XPath this week in order to implement draft ISO Schematron in Java. But the current batch of Java APIs seem to be missing the functions I need: this must be holding back other developers too.

Some very interesting work has been going on with the classes in the System.Xml namespace. Daniel Cazzulino blogs about an XseReader implementation he has been working on for providing XML Streaming Events. I had been using a similar implementation for trying to write a .NET version of an RssValidatingReader awhile back, but gave up due to the complexity of managing an ambiguous stack for co-occurrence validation.

The idea behind XPath location paths is very much the same as directory paths, except that the XPath syntax can get much more complex and detailed. Steve Holzner explains.

This tutorial introduces XPath and covers most aspects of it. It is aimed at people who do not know XPath or want a refresher. If you plan to use XSLT, you should take this tutorial first. You will learn: What XPath is, the syntax and semantics of the XPath language, how to use XPath location paths, how to use XPath expressions, how to use XPath functions, and how XPath relates to XSLT. XPath is a W3C standard. This tutorial covers version 1.0.

The XPathNodeIterator provides methods to iterate over a set of nodes created as the result of an XPath query, or a result tree fragment converted to a node set by use of the node-set method. The XPathNodeIterator enables you to iterate over the nodes within that node set. Once a node set is retrieved, the XPathNodeIterator class provides a read-only, forward-only cursor to the selected set of nodes.

The XPathNavigator class provides read-only random access to data, and is designed for use as an input to XSLT. It is implemented on the XPathDocument, XmlDataDocument, and XmlDocument. The XPathNavigator is based upon the W3C Data Model as described in section 5 of the XML Path Language (XPath) recommendation.