Google has been driving actual URLs into apps, via the creation of Web Share API and Web Share Target API. One doesn't need a subsystem within the operating sys

Google has been driving actual URLs into apps, via the creation of Web Share API and Web Share Target API. One doesn't need a subsystem within the operating system, when the internet already does the job. For reference, here's app-talk describing their core capability: > The goal of the x-callback-url specification is to provide a standardized means for iOS developers to expose and document the methods they make available to other apps. Using x-callback-url’s source apps can launch other apps passing data and context information, and also provide parameters instructing the target app to return data and control back to the source app after executing an action. I do love this idea of showing what capabilities are afforded. This is a little different to me than the Ubiquotous Linking, which reads more to me about exposing data, rather than capabilities. I think both are important!!! Android Apps have intents, but AFAIK it's kind of a barren wasteland of interoperability. There's no registry, no way to see what actions are available. One kind of just has some intents they listen for, and fires off intents they know how to issue. There's no rendezvous, no finding out what one might do. I could be mistaken. But it feels enormously fantastically tightly coupled. And App-Talk seems aimed to make a bit more ad-hoc connections possible. Web Share/Web Share Target do fill this gap nicely, but it is weird that Android in general doesn't seem to have much here.