Validating xml fragments schemas
The first technology used for validating XML structures was known as Document Type Definition (DTD).
If you want to validate an XML document against a DTD that is not referenced by the document itself, you can use the keyword argument to parse from a file.
This also enables correct handling of include files from within the Relax NG parser.
Again, no validation is performed unless explicitly requested.(In other words: Whether documents must contain a document type or xml schema declaration.) The property is ignored otherwise.
Some of the predefined simple types are: xs:integer, xs:boolean, xs:string, xs:date.
For example − A complex type is a container for other element definitions.
This process optimizes memory usage by only loading rows of data when they are requested.
It will try to recover, but if your selection isn't well-formed, chances are the result is not what you want.
You need to declare a schema in your XML document as follows − The following example shows how to use schema − The basic idea behind XML Schemas is that they describe the legitimate format that an XML document can take.
Read(new Stream Reader("Complex Schema.xsd"), XMLValidation Event Handler); Xml Schema testing Schema = Xml Schema.
Read(new Stream Reader("Node Tester.xsd"), XMLValidation Event Handler); Xml Reader Settings validator Settings = new Xml Reader Settings(); validator Settings.
Remember that XML is designed to be interoperable and human readable.
When you commit validation logic to code, you've almost inherently made the validation logic inaccessible to other processes that might come along later. The concept of encapsulating data validation in a class is a good and useful thing, but if other developers can't easily access your data design from outside sources, it may not be as useful to them.As we saw in the XML - Elements chapter, elements are the building blocks of XML document.