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A web-based XML validator. Can be used for free. Validates XML files, prompts the user for referenced files (e. g., XSD), shows good error messages.

XML Check is free online XML and Sitemap validation service and software. It does strict scheme validation, finds all document structure issues and reports errors with line and column numbers

The World Wide Web Consortium (W3C) is an international community where Member organizations, a full-time staff, and the public work together to develop Web standards.

oXygen XML Editor is a cross platform XML Editor providing tools for XML authoring, XML conversion, XSL, XSLT, XQuery, XML Schema, DTD, Relax NG and Schematron development, SOAP and WSDL.

Online tools for developers, including formatters (JSON, XML, HTML, SQL, etc.), minifiers (JavaScript, CSS), validators, compactors and many more!

Web Design and HTML are all about creating a great Web site. Use Web development and Web site design to build Web sites that customers return to over and over again. On this site learn the basics of Web design, HTML, XML, and Web development.

Try or buy Office 2010, view product information, get help and training, explore templates, images, and downloads.

The IBM corporate home page, entry point to information about IBM products and services