Validating xml in java against a xsd
So a namespace that does have a name can never be used as the default namespace. In this case, the schema is the file personal. Once again, use the file personal. Navigate to the samples directory. Note, too, that in this example there is a default namespace that the unqualified element names employee and name belong to.
The document must be associated with at least one schema, and possibly more. You also set a factory attribute to specify the parser language to use. If the schema definition does not define a target namespace, then it applies to the default unnamed, or null namespace. In that way, only one copy of the schema will tend to exist.
Here, we have chosen to run the program on the file personal-schema. Declaring the Schemas in the Application To declare the equivalent schemas in the application, the code would look something like the following.
In general, fully qualified paths are recommended. You do not specify the namespace name. Instead, you only give pointers to the.
When parsed, each element in the data set will be validated against the appropriate schema, as long as those schemas have been declared. In general, though, it is a good idea to keep all the declarations together in one place. Compile the example class, using the class path you have just set.
For the document to be properly validated, the schema for that namespace must be declared, as well as the schemas for the tax and hiring namespaces. You will see how to deal with multiple namespaces in the next section. If a prefix is defined for the tax namespace, and another prefix defined for the hiring namespace, then the personnel data could include segments like the following.
Configuring the DocumentBuilder Factory It is helpful to start by defining the constants you will use when configuring the factory. Validating with Multiple Namespaces Namespaces let you combine elements that serve different purposes in the same document without having to worry about overlapping names. Note - The default namespace is actually a specific namespace.
What is new is the entry in the middle, which defines the locations of the schemas to use for each namespace referenced in the document. You are seeing it here, because at this point you have learned enough about namespaces for the discussion to make sense. This is done by calling the setValidating method on the DocumentBuilderFactory instance dbf, that was created in Instantiate the Factory.
We will take a look at those next. It is also possible to mix the declarations. There is no special declaration for the default unnamed schema.
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