Comments on the CAP-AU Alert Block will be discussed today at 4:00PM. Please take a look and post your comments.
Rex, if you have time to look through the CAP-AU Alert Block that would be great - you have a keen eye for this and can maybe reply on my comments below.
My comments on CAP-AU Alert Block are:
I noted, as Greg recently pointed out in an email, that although the intro says only changed elements will be listed in CAP-AU Profile, there are numerous unchanged elements listed. Should the unchanged elements be dropped from the CAP-AU table?
'Sender' element: Interesting use that this is the agency that assembled the message, not necessarily the agency that originated it. There is an entire paragraph on messages passing through an aggregator where the 'Sender' value is then sometimes changed from the original message. Is this use in keeping with the CAPv1.2 Standard? Changing a message of course negates the ability to check message authenticity at the received end. The description here says the value is to be human-readable. See the Example - is this use ok?
'Source' element: The 'Source' element description says it is unchanged from the CAPv1.2 description, which says it is "The particular source of this alert, e.g. an operator or a specific device." CAP-AU assigns a lengthy agency description to this element, as shown in the Example in the 'msgType' element. Is this in keeping with the CAPv1.2 Standard language?
'Restriction' element: CAPv1.2 says 'Restriction' element is used when 'Scope' element = Restricted. CAP-AU says to use 'Restriction' element when 'Scope' element = Private. The CAPv1.2 Standard says when 'Scope' element = Private, the "Addresses" element is to list those specified addresses.
'Addresses' element: The two notes in the CAP-AU table allude that this element describes geo-locations, but the CAPv1.2 Standard says this is "The group listing of intended recipients of the alert message", making it sound that these are individual delivery addresses.
'Code' element: In Example A, it shows a message satisfying two different versions of the CAP-AU Profile - is this possible? In Example B, it shows a message satisfying both the Australian Profile and Canadian Profile - is this possible?
'References' element: The CAPv1.2 Standard says the 'References' element in an Update message is to include 'Sender', 'Identifier', 'Sent'. The CAP-AU 'References' element Examples do not contain the 'Sender'.