在左侧，可以看到XML模式定义的所有元素和属性的结构。
On the left side, you see the structure of all the elements and attributes defined by the XML schema.
XML 1.0 结构良好性定义专门指出属性是没有顺序的，但是没有说元素。
The XML 1.0 well-formedness definition specifically states that attributes are unordered, but says nothing about elements.
XML模式建议书(XML Schema Recommendation)对用有名称空间的元素和属性定义文档结构有完整的规定。
The XML Schema Recommendation has complete provisions for defining a document structure with namespaced elements and attributes.
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