https://www.ibm.com/docs/en/db2/12.1.x?topic=ist-replicating-data-shadow-tables-infosphere-cdc-management-console
Replicating data to shadow tables with InfoSphere CDC Management Console
To replicate data to shadow tables on a continuous basis, use the InfoSphere CDC Management Console to start mirroring the subscription that you created for...
shadow tablesinfosphere cdcreplicatingdatamanagement
https://www.ibm.com/docs/en/db2/11.5.x?topic=environments-switching-hadr-roles-shadow-tables
Switching HADR roles with shadow tables
To switch HADR roles for a database that contains shadow tables, plan a takeover that performs the appropriate actions to ensure that your shadow tables are...
with shadowswitchinghadrrolestables
https://caniuse.com/shadowdom
Shadow DOM (deprecated V0 spec) | Can I use... Support tables for HTML5, CSS3, etc
"Can I use" provides up-to-date browser support tables for support of front-end web technologies on desktop and mobile web browsers.
https://www.ibm.com/docs/en/db2/11.5.x?topic=tuning-determining-set-tables-shadow
Determining the set of tables to shadow
Use these tips to determine the optimal set of tables to shadow.
the settablesshadow