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From Vyacheslav Pascarel <>
Subject RE: "null" values for multi-value properties and CMIS specs
Date Fri, 04 Nov 2016 19:18:08 GMT
Hi Florian,

Thank you for clarification.

Vyacheslav Pascarel

-----Original Message-----
From: Florian Müller [] 
Sent: Friday, October 21, 2016 4:09 AM
Cc: Vyacheslav Pascarel <>
Subject: Re: "null" values for multi-value properties and CMIS specs

Hi Vyacheslav,

If I recall correctly, most vendors involved in the specification had trouble distinguishing
null strings from empty strings. That's why null values are not supported.
 From a protocol and OpenCMIS low-level API point of view you can send null values, but that
would be outside the CMIS specification.

- Florian

> Hi Everyone,
> A have a general question regarding CMIS specs. CMIS 1.1 says:
> -------------------------
> A property, either single-valued or multi-valued, MAY be in a "not 
> set" state. CMIS does not support "null" property value. If a 
> multi-valued property is not in a "not set" state, its property value 
> MUST be a non-empty list of individual values. Each individual value 
> in the list MUST NOT be in a "not set" state and MUST conform to the 
> property's property-type.
> A multi-valued property is either set or not set in its entirety. An 
> individual value of a multi-valued property MUST NOT be in an 
> individual "value not set" state and hold a position in the list of 
> values. An empty list of values MUST NOT be allowed.
> -------------------------
> Does anybody know what is the reason behind not allowing individual 
> values to be in "value not set" state for multi-valued property? Is 
> there any way to work around that limitation (beside "reserved" values 
> or extensions)?
> Regards,
> Vyacheslav Pascarel

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