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Try all the features of Liquid Studio Free Trial This means that all entities defined in this schema belong to that namespace: It is worth noting the presence of the targetNamespace attribute at this point. We need to do a few things in order to use this.įirst we need to import that schema into this one - so we can see it. This schema defines the entity CustomerType, which makes use of the AddressType defined in the CommonTypes.xsd schema. The use of the targetNamespace attribute in the element ensures all the enclosed definitions (AddressType, PriceType and PaymentMethodType) are all in the namespace: This schema defines some basic re-usable entities and types. So in our example above each of the 4 schema files could have a distinct targetNamespace value. Placing the targetNamespace attribute at the top of your XSD schema means that all entities defined in it are part of this namespace. However, the following would be equally valid: In principle the namespace has no meaning, but some companies have used the URL where the schema is stored as the targetNamespace, and so some XML parsers will use this as a hint path for the schema: The value of targetNamespace is simply a unique identifier, typically a company may use their URL followed by something descriptive to qualify it.
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We can do this by adding the attribute targetNamespace into the schema element in the XSD file: The solution is to place the definitions for each schema file within a distinct namespace. This all works fine without namespaces, but if different teams start working on different files, then you have the possibility of name clashes, and it would not always be obvious where a definition had come from.
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They make definitions easier to read and version as they break down the schema into smaller units that are simpler to manage. You can create re-usable definitions that can be used across several projects. These child schemas can then be included into a parent schema.īreaking schemas into multiple files can have several advantages. Up until now we have assumed that you only have a single schema file containing all your element definitions, but the XSD standard allows you to structure your XSD schemas by breaking them into multiple files. Namespaces are a mechanism for breaking up your schemas. If you choose not to use an XML Data Binding tool, you may be advised to refer to the XSD standard and invest in a good book regarding XML Schema. If you are creating and modifying XML documents validating against XML Schema making use of namespaces, then XML Data Binding will save you a great deal of time as mostly removes this complexity.
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#EJEMPLOS DE SCHEMAS EN ALTOVA XMLSPY FULL#
The full set of namespace rules are very complex, be this overview will provide a basic outline of the technology. So far in this tutorial we have largely ignored namespaces as they are an added complexity over writing and using basic XSDs.