docs: add domain working group nomination process

DOMAIN_WORKING_GROUP_CHARTER.md

@@ -0,0 +1,48 @@
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+
+# Domain Working Group (DWG) Charter Template
+
+## Problem Statement
+
+- Describe the specific problem this DWG proposal aims to solve for the
+  domain. Optionally include any supporting RFCs or documents.
+
+## Strategic Fit
+
+- Explain why this problem needs a UCP DWG.
+
+## Scope
+
+### In-Scope
+
+- List what aspects of the problem are in scope.
+
+### Out-of-Scope
+
+- List what aspects are explicitly **not** part of the scope.
+
+## Key Deliverables
+
+- Outline the key deliverables that will signal completion.
+
+## Deliver By
+
+- Target date by which the DWG intends to finish its work and close.
+
+## DTC Sponsors
+
+- DTC name (e.g., Shopping DTC) and proposed Chairs/Co-Chairs.

GOVERNANCE.md

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   to form a DWG (e.g., "Travel WG"). Once chartered, the DWG has autonomy to
   define capabilities for their domain and submit for DTC approvals.
 
+## Process for nominating new Domain Working Group (DWG)
+
+- Any DTC member can submit a DWG charter nomination (using the
+  [DWG charter template](DOMAIN_WORKING_GROUP_CHARTER.md)) as a new issue
+  in the [UCP Issues
+  tracker](https://github.com/Universal-Commerce-Protocol/ucp/issues).
+- GC reviews the DWG charter and approves or rejects the DWG nomination.
+- GC approves chairs/co-chairs for the DWG, who are accountable for the
+  DWG creation and delivery of the outcomes.
+- GC may assign additional co-chairs for the DWG as part of its approval.
+- DWG chairs/co-chairs may invite additional industry participants to
+  contribute to the DWG via the DWG charter issue.
+- GC reviews and approves the final composition of DWG, including the
+  external industry participants (if any).
+
 ## Domain Tech Councils (Domain TC)
 
 - Members are responsible for building and maintaining core specification for the