Where does XSLT execute?

A diagram simulation. No XSLT engine, network calls or real warnings. Changing the processor's location need not change the CAP data model.

Identifier: fictional-test-123
Sender: demo@example.org
Status: Test
Message type: Alert
Instruction: No action required.

Server execution needs approved stylesheets, restricted resource access and enforceable processing limits. This illustration does not execute or validate a stylesheet.