Http is a protocol we use to communicate between systems, that is true, but not the parts of software. For example, to print "Hello World" on the screen, we use a sub-routine like WriteLine. The standard we use to communicate between software sub-systems, in this case, is a function with parameters. So, WriteLine ("Hello World") pushes the text "Hello World" into the sub-routine WriteLine.

Parameters are, for basically all languages, the means by which information is communicated between sub-systems.

The thing is, it is really hard to standardize the communication between sub-systems because sub-routines can vary widely in how they are defined (the possible combination of parameters and types is quite high). In fact, you can end up with thousands of different sub-routines: even in the same program. Each one unique and thus "non-standard".

This is the problem we need to crack. How do we create frameworks that don't lead to thousands of specialized interfaces: each one making the framework that much harder to use.