If a token is able to recognise its target in a Blockchain strand, our equivalent of a DNA molecule, it "binds" to it and hence to the Blockchain.
If binding occurs, the information hardwired into that token could then be passed across to any other tokens insofar they are also recognized by the Blockchain.
The actual exchange and type of information exchanged require authorisation by the issuer and acceptance by the receiving party,
as it routinely happens in any contractual arrangement.
On demand, arbitrarily. The only requirement is having a digital representation of an asset. It is as simple as that.
There is an exception, however, in the supply of GenS. It is regulated by an automaton designed to adaptively balance GenS supply to demand.
Therefore, other than GenS it is possible to add any asset class to our Blockchain platform if proof of their ownership can be properly asserted and if legal or regulatory compliance can be adequately enforced.