2.6.1. The appendices for an IS-CDD are the same as for a regular CDD.

For reference or comparison, below is what the JCIDS Manual says for the CDD 2021 itself:

2.6.3. Appendix C. Glossary.

2.6.3.1 Add statement: "Unless otherwise stated, the terms and definitions contained in this glossary are for the purposes of this document only."

2.6.3.2 As the Sponsors develop the document glossary, they may leverage applicable definitions from the DoDAF AV-2. These do not have to be identical as some terms will apply only to the document or the DoDAF architecture; however, terms that apply to both must be consistent. Definitions should first reflect use terminology from in the DOD Dictionary, if not then subsequently the Terminology Repository, both found at the DOD Terminology Webpage on the CAC-enabled Joint Electronic Library Plus "+" website - https://jdeis.js.mil/jdeis/index.jsp. Any deviation from existing DOD Dictionary terms should be explained in the glossary. Term source must be identified following the definition. i.e. (DoD Dictionary. JP 3-0), (Terminology Repository. CJCSI 5120.01)

2.6.3.3 As the Sponsor develops the document glossary, they may leverage applicable definitions from the DoDAF AV-2. These do not have to be identical, as some terms will only apply to the document or the DoDAF architecture; however, terms that apply to both must be consistent.