question about STIX v2.1 section 7.3.2

[Mark Finlayson <markaf@fiu.edu>]

Hello,

In reviewing the STIX Version 2.1 Committee Specification 02, dated 25 
Jan 2021, I was confused by the examples provided in section 7.3.2. In 
particular, there are 3 examples on pages 209-211. In the second 
example, ("Adding properties to an existing STIX object instance", 
p210), the id of the definition matches the extension id found in the 
extensions dictionary 
("extension-definition--d83fce45-ef58-4c6c-a3f4-1fbc32e98c6e") of the 
object below. This is what I expected.

However, they extension definition ids do not match in the other two 
examples, and unless I am confused they should. In the first example 
("create a new object type", p209) the extension definition of 
"my-favorite-sdo" has an id of 
"extension-definition--a932fcc6-e032-176c-126f-cb970a5a1fff" but then 
the object of that type presented just below references the id 
"extension-definition--04b2d3ef-d061-4912-ab77-6bbe807a5bd5", which is 
different. A search of the document reveals that the second id appears 
again on page 291 in Appendix C for the examples, where it actually 
matches internally to the example, as I would expect. This makes me 
suspect a typo in the first and third examples on pages 209-211.

Can someone confirm or else explain how I am misunderstanding the 
specification? I will be much obliged. Best regards,

Mark

_______________________
Mark A. Finlayson, Ph.D.
Eminent Scholar Chaired Associate Professor, FIU KFSCIS, Cognac Lab
Interim Associate Director, FIU KFSCIS
Edison Fellow for AI, USPTO
11200 SW 8th Street, CASE Room 362, Miami, FL 33199
+1.305.348.7988 (office); +1.617.515.0708 (mobile); markaf@fiu.edu
.