Program xml schema

You can see the user guide to help you to use this online XSD tool. It is a beta version. Do not hesitate to report a bug or give feedback. If errors are detected then they are displayed below the editors, else a success message is displayed. Choice: For choice complexType, you can specify whether you want to generate only the first element or all elements in this case, your XML will not conform to your XSD.

Step 1: You must fill "XML" editor. Scope: If you select "global", the components elements and types will be added to the global scope, they will be schema children. Otherwise, the components will be nested within another component.

Looking at our example again, it would make much more sense to have a single definition for "Address", which could then be used by both customer and supplier. We can do this by defining a global named xs:complexType:.

Earlier, when we started looking at elements, we said you could define your own types instead of using one of the standard types such as xs:string or xs:integer, and that is exactly what were now doing.

Hopefully, the advantages are obvious. Instead of having to define Address twice once for Customer and once for Supplier we now have a single definition. This makes maintenance simpler, i.

An attribute provides extra information within an element. Attributes have name and type properties and are defined within an XSD as follows:. An Attribute can appear 0 or 1 times within a given element in the XML document. Attributes are either optional or mandatory by default they are optional. The "use" property in the XSD definition is used to specify if the attribute is optional or mandatory.

An attribute is specified within a xs:complexType, the type information for the attribute comes from a xs:simpleType either defined inline or via a reference to a built in or user defined xs:simpleType definition. The Type information describes the data the attribute can contain in the XML document, i. Attributes can also be specified globally and then referenced but more about this later. The default and fixed attributes can be specified within the XSD attribute specification in the same way as they are for elements.

So far we have seen how an element can contain data, other elements and attributes. Elements can also contain a combination of all of these. You can also mix elements and data. You can specify this in the XSD schema by setting the mixed property. Mixed content works well for some types of data HTML being the obvious example , but is very difficult to work with pragmatically and it will cause issues with may productivity tools.

Its very rarely needed and not seen at all in most XSD standards , so if you find yourself thinking of using it, I suggest you examine your design again and make sure you really do!

This standard has been phased out in the Microsoft products in favour of XSD. Defining XML Elements Elements are the main building block of all XML documents, containing the data and determine the structure of the instance document.

In the above example, Address element consists of child elements. With the global type, you can define a single type in your document, which can be used by all other references.

For example, suppose you want to generalize the person and company for different addresses of the company. Instead of having to define the name and the company twice once for Address1 and once for Address2 , we now have a single definition.

This makes maintenance simpler, i. Attributes in XSD provide extra information within an element. Frahaan Hussain. Jordan Stanchev.