[1] Official Document RCC.71 - RCS Universal Profile Service Definition Document () https://www.gsma.com/futurenetworks/wp-content/uploads/2017/07/RCC.71_v2.0.pdf#page=248

rcs-chat:<groupid>?users=<encoded list of users separated by comma>

If the list of users contains the current user, it has to be marked with a special parameter

“self=true”.

[2] Official Document RCC.71 - RCS Universal Profile Service Definition Document () https://www.gsma.com/futurenetworks/wp-content/uploads/2017/07/RCC.71_v2.0.pdf#page=249

When anonymizing a Group Chat URI, any single user in the group shall be anonymized.

Example of an anonymized group address:

rcschat:12345?users=tel%3A%252B123456789%3Falias%3DGoofy%26self%3Dtrue,tel%3A%

252B123456788%3Falias%3DSpooky,tel%3A%252B123456787%3Falias%3Wooky

becomes

rcschat:12345?users=tel%3A<HASH>%3Falias%3DGoofy%26self%3Dtrue,tel%3A<HASH>%3F

alias%3DSpooky,tel%3A<HASH>%3Falias%3Wooky