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Subject: RE: [cti] Updated Extension Proposal

Hi Allan,


I might have missed some discussions, but

what are the relationships between

"11 Customizing STIX" of STIX 2.1 (custom properties,

custom objects, and custom extensions) and

this SEP proposal?






From: cti@lists.oasis-open.org <cti@lists.oasis-open.org> On Behalf Of aa tt
Sent: Thursday, August 6, 2020 12:28 AM
To: cti@lists.oasis-open.org
Subject: [cti] Updated Extension Proposal




Please find attached an updated STIX extension proposal that the mini-group worked with IBM (Jason/Emily) to incorporate an acceptable compromise to their concerns.


In summary:


1) Previously presented extension proposal is maintained and has been named âsub-component extensionâ to clarify the distinction between when it would/should be used vs the additional mechanism added for top-level extension.

2) Added the concept of Top-Level object extension to allow extension properties directly with existing STIX standard objects.

3) Clarified language/definitions around use for both aspects.


The google doc containing the specification changes are here: 


This proposal represents the agreement by all mini-group participants. We would like to encourage the TC to consider this proposal and incorporate the changes to the STIX standard.


Allan Thomson



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