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Re: [dmarc-ietf] Clarification of Subdomain Reporting

John Levine <johnl@taugh.com> Sat, 12 December 2020 18:57 UTC

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From: John Levine <johnl@taugh.com>
To: dmarc@ietf.org
Cc: vesely@tana.it
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Subject: Re: [dmarc-ietf] Clarification of Subdomain Reporting
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In article <6c5878e8-fdd8-05c0-3b60-ba180ecbc391@tana.it> you write:
>Maybe it's me, but I don't understand the change below.  The only difference I 
>see between Old: and New: is the removal of «minOccurs="1"».  Since that is the 
>default value, I see no incompatibility.  What am I missing?

If there is neither minOccurs nor maxOccurs, the field occurs exactly once.

>>     <xs:complexType name="IdentifierType">
>>       <xs:all>
>>         <!-- The envelope recipient domain. -->
>>         <xs:element name="envelope_to" type="xs:string"
>>                     minOccurs="0"/>
>>         <!-- The RFC5321.MailFrom domain. -->
>>         <xs:element name="envelope_from" type="xs:string"
>>                     minOccurs="1"/>
>> Old:
>>         <!-- The RFC5322.From domain. -->
>>         <xs:element name="header_from" type="xs:string"
>>                     minOccurs="1"/>
>> 
>> New:
>>         <!-- The RFC5322.From domain. -->
>>         <xs:element name="header_from" type="xs:string"/>
>> 
>>       </xs:all>
>>     </xs:complexType>

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