Validating samples

You can validate an XML document sample against the corresponding DTD or XSD (XML Schema).

DTDs	The <!DOCTYPE...> tag in the sample determines which DTD to validate against. For example: <!DOCTYPE Music SYSTEM "C:\DTDS\musichits.dtd">
XSDs	In the root element, you must use the schema location attributes prefix:noNamespaceSchemaLocation or prefix:schemaLocation to specify which XSD to validate against. For example: <root xsi:schemaLocation="C:\DTDS\musichits.xsd"> The schema location attributes have the namespace URI http://www.w3.org/2001/XMLSchema-instance. See the W3C XML schema recommendation for more information.

Validating on load

You can configure the XMLIN tool to validate a sample each time it is loaded:

1	Select Tools > Options. The Options dialog box opens.

2	On the Samples tab, select Validate instance document on load.

Validating manually

You can also validate a sample manually by right-clicking the sample and selecting Validate.