Per my knowledge, this is correct. It must be unique otherwise it would end up pulling all libraries irrespective of its path in /apps or /etc

Probably you have a valid use case for using two domains for the same content tree but that's a separate topic.The urls are not shortened for root page or children pages? I see two entries here for domain mapping, what about the other rule for children pages of '/content/jca'. There must be another ...

Per my knowledge, it is a more or less similar way as you'd proceed with for content pages. You can create language copy/live copy as a variation of experience fragment. For exposing to third party apps, use .plain. selector.check-Experience Fragments

Probably, you are missing required headers via POSTMAN. Make required config changes to CSRF and Sling Referrer Filter for testing via POSTMAN - allow empty headers for testing. Enable Postman Interceptor and checkHave you tested your setup with usual 3 legged config to rule out any configuration re...

Yes, you'd need to configure Cloud Services in AEM. You could also go via API route w/o using DTM & Adobe I/OIntegrating with Adobe Analytics Adobe Experience Manager Help | Integrating Adobe Experience Manager 6.1 Components with Adobe Analytics  // old link but you'll get the ideaOverview

6.2 uses old version of OAK API than 6.4. In addition to that, 6.2 uses '.cfg' extension for configuration files but 6.4 uses '.config' extension. I doubt that it would work.Better approach would be to upgrade/migrate 6.2 to 6.4 and then set up shared datastore.

You may use http://localhost:4502/libs/granite/ui/content/dumplibs.html which has http://localhost:4502/libs/granite/ui/content/dumplibs.test.html and other utilities

Per my knowledge, you would need to configure proxy (to make TLS v1.2 mandatory) for HTTP Client under '/system/console/configMgr' and get what you want to do.Depending on how you configure HTTP2 (strict or lenient) for both AEM and Dispatcher/Webserver, replication/flush agents would work otherwise...

How is '/content/myapp' related to '/content/jca'?Why do you have two replacement domains defined for a single pattern? I assume you have a way to control which one should be applied on what environment? If not, then that is your problem. You could remove "uat1" and test in prod or remove "www" in u...

These are official docs - Adobe Experience Manager 6.1 - docs.adobe.com You may find generic videos/articles of both Classic & Touch UI in AEM blogs on web. I don't think are any official tutorials for 6.1