Contact information is crucial for the work with sensor registry.awi.de. Most important is the role of an editor, since this is the only person/institution that can alter the item, add other roles, or modify the state. When adding a new contact to your item you can choose (and filter) from a list of existing entries. If there is an entry that suits your needs, just assign a proper role.
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When in doubt or something is missing to your opinion, please send a support request to o2a-support@awi.de or ask the chief editors of your project.