相反，它是为字段增加了注释，向可视化编辑器说明这一集合的隐藏类型为字符串。

Instead it adds an annotation to the field which informs the visual editor that the underlying type of this collection is String.

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接下来，在联邦服务器，需要将序列化后的字符串转换回xml类型。

Next, at the federated server, you need to convert the serialized string back to the XML type.

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有些解析器的实现可能不支持字符串内部化特性。

Some parser implementations may not support the string internalization feature.

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