XML Validator - W3Schools
https://www.w3schools.com/xml/xml_validator.aspA "valid" XML document must be well formed. In addition, it must conform to a document type definition. There are two different document type definitions that can be used with XML: DTD - The original Document Type Definition. XML Schema - An XML-based alternative to DTD. A document type definition defines the rules and the legal elements and ...
The W3C Markup Validation Service - W3C HTML Validator
validator.w3.orgMarkup Validation Service. This validator checks the markup validity of Web documents in HTML, XHTML, SMIL, MathML, etc. If you wish to validate specific content such as RSS/Atom feeds or CSS stylesheets, MobileOK content , or to find broken links, there are other validators and tools available. As an alternative you can also try our non-DTD ...
Validating Your Sitemap : XML
www.brainbell.com › tutorials › XMLAug 01, 2016 · The W3C Validator for XML Schema allows you to choose between several different output options for the validator but in all likelihood the default option will work fine for you. All you really have to do to use the tool is specify a Sitemap file. In this case, I opted to publish my Sitemap file on the Web.
XML Validator - W3Schools
www.w3schools.com › xml › xml_validatorThe W3C XML specification states that a program should stop processing an XML document if it finds an error. The reason is that XML software should be small, fast, and compatible. HTML browsers are allowed to display HTML documents with errors (like missing end tags). With XML, errors are not allowed. Syntax-Check Your XML
XML Validator - W3schools
www.w3schools.blog › xml-validatorAn XML application is stopped by errors in XML documents. According to the W3C XML specification, on finding an error, a program should stop processing an XML document, to make sure that the XML software is small, fast, and compatible. HTML documents with errors (like missing end tags) can be displayed by the HTML browsers.