A sample xml program

Company Questions. Artificial Intelligence. Cloud Computing. Data Science. Angular 7. Machine Learning. Data Structures. Operating System. Computer Network. Compiler Design. Computer Organization. Discrete Mathematics. Ethical Hacking. Computer Graphics. Software Engineering. Web Technology. Cyber Security. C Programming. Control System. Data Mining. Data Warehouse. Javatpoint Services JavaTpoint offers too many high quality services. All elements can have sub elements child elements. We can now declare the attribute of the "shiporder" element.

The previous design method is very simple, but can be difficult to read and maintain when documents are complex.

The next design method is based on defining all elements and attributes first, and then referring to them using the ref attribute. The third design method defines classes or types, that enables us to reuse element definitions. This is done by naming the simpleTypes and complexTypes elements, and then point to them through the type attribute of the element.

So, the following fragment means that the value of the element or attribute must be a string value:. The restriction element is more often used to apply restrictions to elements.

Look at the following lines from the schema above:. This indicates that the value of the element or attribute must be a string, it must be exactly six characters in a row, and those characters must be a number from 0 to 9. We just launched W3Schools videos. Get certified by completing a course today!

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