As such, the taxonomy models managed in these system-specific tools are not easily integrated with other systems without extensive custom software development efforts.

因此，在这些系统特定的工具中进行管理的分类法模型不容易与其他系统进行集成，往往需要进行大量的定制软件开发工作。

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Further, public agencies frequently development their own custom versions of tools and software that can be bought inexpensively from third-party providers.

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