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What is the purpose of the CCD id element when we use UUID for the root value?

I know it is used for identification, but when I see UUID's being used for various sections inside the CCD/CDA, I wonder if it is only for identification inside the document, ie not in the database of the sender or receiver for identifying the particular record.

<id root="5edd43a9-0e70-4b32-9bce-7950c5cfcbee"/>

Would "5edd43a9-0e70-4b32-9bce-7950c5cfcbee" be stored in any database to tie it to that record, or is it only generated randomly when generating the CCD, and only ever used when looking at archived versions of transmitted CCD's?

I've just been working on a few projects involving CCD & CCR documents (Mainly CCR).

Looking at http://www.onehealthport.com/HIE/Companion_Guide%20_CCD_Version1dot1.pdf it seems that the id is for the benefit of the document creator. What the creator uses the ID for would be up to them (logging, reviewing past documents, flagging particular documents as having errors, whatever).

We don't store the generated number anywhere, but I don't see why someone wouldn't/couldn't for their own benefit.

Not sure if this answers your question, but I hope if helps.

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