A root item is an item that can be copied (claimed or merged) from the Domain Explorer or the EDE as part of the As-Built functionality. It is called a root item because it is the starting point for building the tree of items to be copied, based on the relationships between the items. Root items can be of the following item types:
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Loop
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Instrument
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Uncoupled Control System Tag
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Panel
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Terminal Strip
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Terminal
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Rack
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Slot
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Wiring Equipment
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Cable
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Wire
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Custom Cross Cable
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Foundation Segment
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Profibus Segment