Validating non validating parser xml datingolderwomencougars com
while DOM gave us facility of tree structure which we can obtain from an XML document after parsing it with SAX parser.By default the instance of parser which we obtain by calling SAXParser Factory method new Instance() is non validating but u can make it validating by SAXParser Factor's method set Validating(true).Sun's implementation supports any combination of configuration options.(If a combination is not supported by a particular implementation, it is required to generate a factory configuration error.) Although a full treatment of XML Schema is beyond the scope of this tutorial, this section shows you the steps you take to validate an XML document using an existing schema written in the XML Schema language.In other words, the message is saying that you are trying to validate the document, but no DTD has been declared, because no declaration is present. (In the next section, you'll learn how to define parameter entries so that we can use XHTML in the elements we are defining as part of the slide presentation.) It is important to recognize that the only reason an exception is thrown when the file fails validation is as a result of the error-handling code you entered in the early stages of this tutorial.So now you know that a DTD is a requirement for a valid document. What happens when you run the parser on your current version of the slide presentation, with the DTD specified? That code is reproduced here: is a validation error, although you have seen that it can also be generated if the file specifies a version of XML that the parser is not prepared to handle.Remember that your application will not generate a validation exception unless you supply an error handler such as the one here.Conforming XML processors fall into two classes: validating and non-validating.
As far as your question about Validating and non Validating is concerned, either we use SAX or DOM we use the same parser which is the SAX's paser.
For now, think of these attributes as the "magic incantation" you use to validate a simple XML file that doesn't use them.
After you've learned more about namespaces, you'll see how to use XML Schema to validate complex documents that use them.
To do that, you'll use a document type definition (DTD) as you experiment with validation.
To see what happens when the XML document does not specify a DTD, remove the declaration. Because you don't yet have one, it's value is null.