No it doesn't hold multiple values but Yes it does work with regex for multiple ,similar path urls. Refer to https://sling.apache.org/documentation/the-sling-engine/mappings-for-resource-resolution.html

Please share logs

I believe you need to change the dependency scope to compile instead of provided.because provided scope is only available on the compilation and test classpath, and is not transitive.refer to Maven – Introduction to the Dependency Mechanism

I think you want to say "So now in my B's pom.xml I'll add only project A in its dependency, as X jar is served by A by concept of transitive dependency."What value are you defining in dependency scope ? Yes transitive dependencies work the way you explained but dependency scope,mediation,exclusions...

Please share logs

Try https://gist.github.com/gabrielwalt/c835d70e7263f5d0699d or  https://helpx.adobe.com/experience-manager/using/creating-htl-component.html

Can you share screenshot of the errors you see in browser console logs or error.log file

what version of AEM are you using ? I am not able to reproduce it on 6.2

Get the value of richtext in main.js , do the replace and continue with the same ${main.year}

The values set on the Authentication Requirements configuration property or the sling.auth.requirements service registration property can be absolute paths or URLs like the path service registration property of AuthenticationHandler services. This allows the limitation of this setup to certain reque...