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If the schema definition does not define a target namespace, then it applies to the default (unnamed, or null) namespace.
So, in our example, you would expect to see these target namespace declarations in the schemas: An array of Objects can be used only when the schema language has the ability to assemble a schema at runtime.
Again, the schemas can be declared either as part of the XML data set or in the program. In general, though, it is a good idea to keep all the declarations together in one place.) To declare the schemas to use for the preceding example in the data set, the XML code would look something like the following.
declaration consists of entry pairs, where the first entry in each pair is a fully qualified URI that specifies the namespace, and the second entry contains a full path or a relative path to the schema definition. In that way, only one copy of the schema will tend to exist.
You are seeing it here, because at this point you have learned enough about namespaces for the discussion to make sense.
To contrive an example, consider an XML data set that keeps track of personnel data.
This section looks at the process of XML Schema validation.
There are two ways to do that: , which stands for "XML Schema instance." The second line specifies the schema to use for elements in the document that do not have a namespace prefix-that is, for the elements you typically define in any simple, uncomplicated XML document.HTML browsers are allowed to display HTML documents with errors (like missing end tags). A "well formed" XML document is not the same as a "valid" XML document. In addition, it must conform to a document type definition. For more information, see the Validate method documentation. The data set may include information from a tax declaration form as well as information from the employee's hiring form, with both elements named Note - The default namespace is actually a specific namespace.It is defined as the "namespace that has no name." So you cannot simply use one namespace as your default this week, and another namespace as the default later.