迁移到 PODS4 并没有改变 PODS 的功能性需求，但是 pureXML 技术简化了元数据处理，有助于满足系统的响应时间和可伸缩性目标。

The migration to PODS4 did not change the PODS functional requirements, but pureXML processing simplified metadata processing while meeting the system's response time and scalability goals.

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