Device Properties Protocol Spec - Draft 1

Tomas Carnecky tom at
Sun Sep 7 07:13:18 PDT 2008

Peter Hutterer wrote:
> On Sat, Sep 06, 2008 at 05:15:51PM -0700, Keith Packard wrote:
>> On Sat, 2008-09-06 at 17:23 +0300, Daniel Stone wrote:
>>> Isn't this just PropModeReplace with nItems = 0?
>> Is there a difference between a property of length zero and an absent
>> property?
> nItems = 0 remove the content, but not the property itself, hence the need for
> DeleteProperty. This is also the behaviour core has with window properties.

What is the difference between a property with no content and no
property? In which situations would this distinction be useful?


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