Using XML with Legacy Business Applications

Attribute Declarations

As I said earlier, adding Attributes to Elements and understanding what that does to simple versus complex types is one of the more awkward parts of the Schema Recommendation. However, once you get your head around this idiosyncrasy, Attribute declarations are fairly straightforward. Here's a plain-vanilla version in which we just extend our Columns from a simple type to a complex type by adding the ColumnNumber Attribute.

Specifying a ColumnNumber Attribute in SimpleCSV3.xsd

<xs:complexType name="ColumnType"> <xs:annotation> <xs:documentation>Here we add the ColumnNumberAttribute, type integer, and optional to the ColumnType. </xs:documentation> </xs:annotation> <xs:simpleContent> <xs:extension base="xs:string"> <xs:attribute ...