Validating input in java

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This program validates the XML document against the schema successfully.However, when the user selects the XML document catalog1.xml, validation fails for the book element in the lines containing more than one title element.Adobe provided a lot of infrastructure to do that with just a simple script.Let’s take a look at how to do that with a text field that is only supposed to have a value of either ‘AAAA’ or ‘BBBB’ (yes, I know that this does not make much sense in a real PDF form).Then we select the “Validate” tab to see the validation options: The default is that the field will not get validated.For numeric fields, there is a convenient way to validate a value range, but we want to select to run a custom validation script.

More information about HTML Tidy is available from the original W3C page, and you can download a local copy of it from the Source Forge project page.

When the program encounters the invalid node, the method Validation Error is called that displays a message explaining why validation failed. An object of the class Xml Schema Set stores a collection of schemas that an Xml Reader can be validated against.

It assigns a new Xml Schema Set object to variable schemas, and calls this object's Add method to add a schema to the collection.

HTML Tidy is a tool for error checking and cleaning up HTML source files.

It is especially useful for finding and correcting errors in deeply nested HTML, or for making grotesque code legible once more.

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