— Java.net. XQuery Tutorials. Home > Learn XML > XML Tutorials > XQuery Tutorials These XQuery tutorials will give you the ability to query in ways you have never dreamed possible.
With XQuery at your side, heterogeneous data sources don't stand a chance at hiding what your looking for! Learn XQuery in Ten Minutes "Learn XQuery in 10 Minutes" is for all those people who really want to know what XQuery is, but don't have the time to find out. We all know the problem: so many exciting new technologies, so little time to research them. Blooming FLWOR: An Introduction to the XQuery FLWOR Expression FLWOR expressions are a powerful and important part of XQuery in the same way as path expressions are at the heart of XPath. XQuery Examples: Introduction to XQuery. Example 1-1.
Product catalog input document (catalog.xml) <catalog><product dept="WMN"><number>557</number><name language="en">Fleece Pullover</name><colorChoices>navy black</colorChoices></product><product dept="ACC"><number>563</number><name language="en">Floppy Sun Hat</name></product><product dept="ACC"><number>443</number><name language="en">Deluxe Travel Bag</name></product><product dept="MEN"><number>784</number><name language="en">Cotton Dress Shirt</name><colorChoices>white gray</colorChoices><desc>Our <i>favorite</i> shirt!
</desc></product></catalog> Example 1-2. Price information input document (prices.xml) Xml - How to implement constraints / conditional operators in Relax NG. Xml - How do I specify a numeric range of occurences in RELAX NG. Validator.nu.
XQuery Examples: Introduction to XQuery. Camprocessor. XQuery/XQuery and XML Schema. Motivation[edit] In learning any modelling language, it is helpful to see sample instances of any formal model.
This is equally true when developing an XML Schema. XML Development tools like Oxygen and XML-Spy have tools to generate a random instance of a supplied XML schema, but it is useful to have a web service to do this. The service can also be used for test data generation. The following is a test XML Schema file: Sample XML Schema[edit] <? XQuery to convert Simple XML Schema into an Instance Document[edit] We can use a recursive function to convert this XML Schema into an instance document. This function uses the element construct to create a new XML instance tree based on the information in the XML Schema file and the typeswitch construct to select the appropriate processing of a given element type.
Type Instance Generation[edit] Some helper functions are required to generate random instances of (some of ) the standard types. Script[edit] Execute. RELAX NG home page. Conversion of a XSD schema to RelaxNG. Benefits XSD is a complex language of XML specification and lots of its markups are, in my opinion, useless.
RelaxNG has been created by specialists of XML technologies, at a moment when XML has became a lot more mature and a lot more used. I think RelaxNG reduces the problem of complexity of XML specifications. And it also gives good habits which helps making better XML, like creating attributes nodes instead of surrounding any value by opening/closing markup. That XSLT conversion may be less "exact" than a conversion performed by a Java API like Sun Multi-Schema Validator.
Explanation Correspondances table between XSD and RelaxNG. Bali - RELAX NG Validatelet Compiler. Bali is a "RELAX NG validator compiler" that reads a RELAX NG schema and produces a validator that can validate documents with the given schema.
For example, Bali can read a XHTML schema at the compile time, and it produces XHTMLValidatelet.java, which is a Java source code. Then you compile this file along with your other source code, and at the runtime this class can be used to validate XHTML documents before you process it. Advantages Compared to general-purpose validators, such as MSV and Jing, this approach has the following benefits: Bali can produce a validator in various programming languages, which makes it easy to use RELAX NG in those platforms that don't have general purpose RELAX NG validator implementations. Downloads Bali (Ver.2002/11/30) including binaries, soure code, and documentations. Documents Using Java Validatelet This document explains how to generate a Java validatelet and use it in your application. Using Win32 Validatelet. XQuery. Welcome to the XQuery Examples Collection Wikibook!
XQuery is a World Wide Web Consortium recommendation for selecting data from documents and databases. Current Status[edit] We are in the process of testing many of these examples using the eXist 2.0 release. Please let us know if you find any problems. We are looking for volunteers to help us create XQuery 3.0 examples. Recent Changes New and Revised Articles[edit] About this Project[edit] This is a collaborative project and we encourage everyone who is using XQuery to contribute their XQuery examples. Execution of examples use an eXist demo server.