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Subject: Re: [EXT] [cti] Re: Extension proposal draft in STIX2.1

Allan â


This is great work and Iâm looking forward to the working call on Tuesday, October 6th!


Thank you,



From: <cti@lists.oasis-open.org> on behalf of aa tt <atcyber1000@gmail.com>
Date: Tuesday, September 29, 2020 at 5:35 PM
To: <cti@lists.oasis-open.org>
Subject: [EXT] [cti] Re: Extension proposal draft in STIX2.1


All - I would like to bring attention to some enhancements to the extension proposal (pun intended :-)) that were recently updated (today).


Upon review of the proposal it was thought that it would be useful to allow an extension to include the option for both new object(s) as well as additions to existing objects for SDO, SCO and SRO.


Therefore, when declaring an extension the option to define that it includes those multiple options was desired.


The change was to update the specification of the extension declaration object, from a boolean property to a list property which declares what options were included in the extension. 


To support this change we added an enumeration for all types of extensions in section 10.


The working call next Tuesday will cover the proposal as well as any further feedback. Please come prepared or post to the email list with your feedback.



On Sep 25, 2020, at 9:41 AM, aa tt <atcyber1000@gmail.com> wrote:


All - We have updated a draft version of STIX2.1 to include the changes for STIX Extensions.


Document Link:


Change summary.


- Section 3.2

- Section 7 (new object called Extension inserted after marking definition), Section 7.1.1, Section

- Section 11

- Section 12.3.3/Section 12.3.4


Also look at the google doc comment history. It has all the changes and you can just click on each one to take you to the specific details.


There will be a separate TC working call to review any further changes but any comments posted in google doc would be greatly accelerate the review.




Allan (on behalf of the SEP proponents)





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