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Re: CIF-JSON draft 2017-05-08

> The other issue is indeed the one you describe, that CIF overall does not draw an inherent distinction between unlooped items and items presented in a single-packet loop.  The mmCIF and other DDL2 dictionaries in fact explicitly disclaim any semantic distinction between those alternatives
So DDL2 cannot ensure that, for example, _entry.id is a string, not alist of strings?I didn't realize that. It looks to me as a step back from DDL1 whichcan define _list yes/no/both.
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