Subject: Re: [Ecrit] draft-ietf-ecrit-additional-data-10: mandatory elements in blocks

From: James Winterbottom <[email-masked]>
Date: Mon, 30 Sep 2013 11:58:43 +1000

On 01/08/2013, at 3:09 AM, "STARK, BARBARA H" <[email-masked]> wrote:

> Comments related to blocks with no mandatory elements.
> The Use statements for an element should not be considered a statement as to whether the block itself is mandatory or optional. Bock usage/inclusion Use statements need to be elsewhere. So Use of an element is restricted to use of that element within a block that exists.
> -------------
> 3.3.  Device Information
> 
> Comment 20: It's sort of weird that there's not a single required element for this block. But, ok. Does this mean it's possible to have the block present with nothing in it?
[AJW] Yes, but that isn't very useful.. *8)
> --------------
> 3.4.1.  xCard for Subscriber's Data
>   Use:  Conditional : Some services (e.g., prepaid phones, initialized
>      phones, etc.) may not have this information.
> 
> Comment 21: What's the condition? Or is it really just Optional?
[AJW] I think that the condition is that if the information is available then it should provided. I will update to make this more clear.
> As with DeviceInfo block, there are no required elements. But in this case, this is the only possible element. So it seems that if a Subscriber block exists, then this SubscriberData element is Required. Otherwise it makes no sense for the Subscriber block to exist.
[AJW] Again, if there is no data to provide then there is no point in providing the block.
> --------------
> 3.5.1.  Comment
> 
>   Data Element:  EmergencyCall.Comment
> 
>   Use:  Optional
> 
> Comment 22: Again, it makes no sense for the one possible element of a block to be optional when that block is present. This is a statement about the existence of this element in the block and not about the block itself. All blocks are effectively optional.
[AJW] Same as before.
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