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Subject: Re: Help with type definition
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On 16-May-14 09:50, Simon Wright wrote:
> But it's the_length_  of the string; so what meaning would OP attach to
> a received message with a length of zero, vs a length -1?

While it's true that the empty-string and null are different, when it 
comes to transmitting the data it makes little sense to transmit what is 
non-existent -- though I suppose you could.