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Nonvalidatingparser, choosing the Parser Implementation

Using the Validating Parser

Sun's implementation supports any combination of configuration options. Such declarations are ignored. Certain cases where the character-encoding declaration does not look right. Then you must configure the parser to tell it which schema language to use.

That will in turn make life easier for the users of applications built with this processor. When the application specifies the schema to use, it overrides any schema declaration in the document. Nonvalidating processors may skip some tests if the tests require processing a class of external entities general, parameter, or both which that processor is known not to handle.

To process any generally ignorable white space that the parser sees, you would need to add something like the following code to implement the ignorableWhitespace event handler. The non-validating parser's main goal is to operate as rapidly as possible, but it too generates some warnings.

The last step is to configure the parser to tell it which schema language to use. There were a variety of cases where array indexing exceptions were reported, or where certain syntax was incorrectly accepted. However, in this case it does not make sense to have more than one title in a section of a document.

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Choosing the Parser Implementation

References to an undefined parameter entity when not validating. Many of those are attributable to this being an early release. If you have not already done so, navigate to the samples directory. Perhaps the most worrisome case of wrongly accepting a document was accepting a document which omitted an end tag. Once more, do not forget to save the modification.

It's time to have a look at the validating parser to find out what happens when you use it to parse the sample presentation. For now, understand that schema validation is a namespace-oriented process. In some cases, warnings may be reported when processing these documents, but these do not indicate failures. By specifying the schema to use in the application.

To use a parser from a different manufacturer, dating a guy with a busy job you can change the value of the environment variable that points to it. There are two ways to do that.

Diagnostics for failed tests are presented in italics, with a cherry colored background, to highlight the result. Can the file be validated now?

This was shown in Configuring the Factory. What happens when you run the parser now? Again, do not forget to save the file, but leave it open. Those ideas are discussed in Validating with Multiple Namespaces.

This group of tests must accordingly produce no test failures. Descriptions of these options, -dtd, -xsd, and -xsdss are also added to the usage method, but are not shown here. More information about namespaces is provided in Document Object Model but for now, understand that schema validation is a namespace-oriented process.

Configuring the Factory The first step is to modify the Echo program so that it uses the validating parser instead of the nonvalidating parser. That element is not optional, and the copyright slide does not have one. Some warnings are generated only by the validating parser. With respect to the output from this processor, there were a handful of cases where incorrect data was reported. To do this, you must specify the -dtd option when you run the program.

Because you don't yet have one, it's value is null. Do not forget to save the modification, but leave the file open, as it will be needed again later. In all cases, negative tests that appear to pass diagnostics presented with a white background must be individually examined in the report below.

Referencing an undeclared element type. There appear to be some problems with character set handling.

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Declaring attributes for undeclared element types. Note - When the application specifies the schema to use, it overrides any schema declaration in the document.

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Using the Validating Parser Up until this point, this lesson has concentrated on the non-validating parser. Delete the declaration of the schema definition personal. Explanation of Tables Sections presenting test results are composed largely of tables, with explanations focussing on exactly what those tables indicate.

You should see the correct output. To configure it to return a namespace-aware parser, you can also use setNamespaceAware true. The document must be associated with a schema.

The declaration of the email element is now as follows. However, not all parsers are created equal. This section examines the validating parser to find out what happens when you use it to parse the sample program. Accordingly, treat these results as preliminary. To get those characters, you would add the ignorableWhitespace method to your application.

In other words, it can tell you whether the document is valid. For example, by examining the schema definition, you can see that each person element requires a name, and that each person's name must comprise a family name and a given name. In the interest of brevity, the only tests listed here are those which produce diagnostics of some kind, such as test failures.

This can affect application code. Diagnostics for succesful tests should as a rule only exist for negative tests.