An XML "value," computed by a query expression, may consist of zero, one, or many items, each of which may be an element, an attribute, or a primitive value.
由查询表达式计算出来的XML“值”，可为零项、一项或者多项，而其中每一项可以是一个元素、一个属性或一个原始值。
Only a primitive ID attribute mechanism is available (in other words, no uniqueness scope).
只能使用一个简单的标识属性机制（换句话说，没有唯一性作用域）。
An attribute of an object is represented by a Property which can be a primitive type or a reference to another object.
对象的属性由Property表示，它可以是基元类型，也可以是对另一个对象的引用。
应用推荐