Home >Online Product Documentation >Table of Contents >Custom XML Validation Engines < Previous| Next > Custom XML Validation Engines Stylus Studio supports several XML validation engines, including the MSXML4.0 SAX Parser, Xerses-J 2.3.0, and .NET XML. The custom validation engine feature lets you register your own XML validation engine with Stylus Studio. Custom validation engines are added to the Validate Document drop-down list in the XML Editor once you register them with Stylus Studio, as shown in Figure 577. Figure 577. Validate Document Drop-Down List Output for custom validation engines is displayed in Stylus Studio's Output Window. Output for other custom applications, such as that created by the custom document wizard, is also displayed in Stylus Studio's Output Window. Figure 578. Output Window < Previous| Next >