An “unknown” service means we could not map that service with our pre-defined Data Processing Service templates. In such cases, you could either create your own Custom Data Processing Services or simply ignore them, if the detected services are irrelevant for you or have already been added to your CMP. If a found URL belongs to a data processing service that you have already added in the Service Settings, you can also ignore the entry in the DPS Scanner. It means, the DPS only needs to be added once and further DPS Scanner results can be ignored, if they match an already added DPS.
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