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Some parsers can also validate the document against a schema.
Validates the XML string/file against the specified XSD string/file.
In your DTD you generally have to choose a single namespace declaration method because of the weak namespace support*.
Here’s the DTD from the above sample modified for namespaces declared in two different ways: namespace prefix.
The validator will report fatal errors, non-fatal errors and warnings.
If the XSD is publicly available using HTTP and referenced through a "schema Location" or "no Namespace Schema Location", then the validator will pick it up and it doesn't need to be specified/uploaded.
DOM, XSL and typical SAX processing all inherently rely on this guarantee of well-formed XML documents.
A parser is a piece of software which reads the document and handles the intricacies of the XML format for the programmer.
The XML Schema specification is divided into three parts.
The first part is called the primer and describes basic usage of XML Schema.
This essay is not a reference for any particular validation method; rather it aims to demonstrate how .
We’ll begin with brief introductions and examples of several validation methods.