将每种产品的价格、名称、元数据和库存信息返回给用户。
Return the item price, name, meta data and stock information for each item to the user.
除此之外，他们假设发送端和接收端充分了解消息的前后关系，因此对诸如参数名称或类型的任何元信息都不编码。
In addition, they assume that both the sender and the receiver have full knowledge of the message context and do not encode any meta-information such as the names or types of the arguments.
例如，如果一个XML文档包含10个类型完全不同的节点，每个节点都包含一个日期元素作为其子节点，那么日期元素就是非唯一元素名称。
For example, if an XML document contains 10 entirely different types of nodes and each type includes a date element as a descendant, then the date element is a non-unique element name.
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