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Proposal:

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Proposal:
Absence of nullable facet on collection means it's unknown if you can insert nulls. You can try, but it may fail.
Nullable=true means that the collection may contain null values (although attempting to insert a null value may still fail for a variety of reasons)
Nullable=false means that the collection can not contain null values

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Proposal: Absence of nullable facet on collection means it's unknown if you can insert nulls. You can try, but it may fail. Nullable=true means that the collection may contain null values (although attempting to insert a null value may still fail for a variety of reasons) Nullable=false means that the collection can not contain null values
Resolution:

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Approved 2015-4-16 as proposed, with the cautionary note to the client that, in the absence of this facet, services may refuse collections with null values.

https://www.oasis-open.org/committees/download.php/57688/odata-v4.0-wd08-part3-csdl-2016-03-03.docx

Accepted: https://www.oasis-open.org/committees/download.php/57722/odata-meeting-123_on-20160310-minutes.html

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Approved 2015-4-16 as proposed, with the cautionary note to the client that, in the absence of this facet, services may refuse collections with null values. https://www.oasis-open.org/committees/download.php/57688/odata-v4.0-wd08-part3-csdl-2016-03-03.docx Accepted: https://www.oasis-open.org/committees/download.php/57722/odata-meeting-123_on-20160310-minutes.html

We missed to spell out the default value for the Nullable facet. For single valued properties we defined the default value as true.