Now that you have some idea about data annotation attributes, let's develop a simple ASP.
NET MVC application that makes use of these attributes for data validation. NET MVC project and select the Empty project template.
The English version of this specification is the only normative version. In particular, erratum [E09] relaxes the restrictions on element and attribute names, thereby providing in XML 1.0 the major end user benefit currently achievable only by using XML 1.1.
However, for translations of this document, see Technology? As a consequence, many possible documents which were not well-formed according to previous editions of this specification are now well-formed, and previously invalid documents using the newly-allowed name characters in, for example, ID attributes, are now valid.
This document specifies a syntax created by subsetting an existing, widely used international text processing standard (Standard Generalized Markup Language, ISO 8886(E) as amended and corrected) for use on the World Wide Web.
If an error message is not specified, a default error message is displayed.
Validating HTML for email can be tricky–read on for our how-to guide.
One of the most popular validators is the free one maintained by the W3C, or World Wide Web Consortium.
HTML validators are invaluable tools for people that write code.
They can let you know if there are any errors present that might cause display issues and give you some clues for debugging.
Copyright © 2008 The Extensible Markup Language (XML) is a subset of SGML that is completely described in this document.