Research about possible Protocolls:

• Is ActivityPub the all-size-fits solution? How do we extend Activity-Pub for calendars e.g. in nextcoud https://nextcloud.com/blog/activitypub-the-new-standard-for-decentralized-networks/
• Check CalDav / CardDav sync brokers
• Json based
• review what Wordpress is offering
• What about using Git-Branch Management?
• What about the Approach by GoodDB

Create a WIKI page Spreadsheet and describe

• API endpoints and how to interface with various platforms
• What are advantages and problems which each system/Protocoll

Result

Here is the spreadsheet to compare Datamodels: https://cloud.m4h.network/index.php/apps/onlyoffice/s/BXbR2k6n4MQXsX3?fileId=112043

• Kartevonmorgen.org
• transition-initiativen.org
• wechange.de
• InCommon
• treeday.net
• pioneersofchange
• CardDav

List of all possible Mapping projects: https://docs.google.com/spreadsheets/d/14EtBugtnvo6fjLcFYqzfi-fbukc786P3FkCWhI_1jAc/edit#gid=628997516

Wiki with Peopls Contacts is here: https://git.fairkom.net/fairsync/project/-/wikis/people-network