I think the following are all equivalent notations for the same graph:
1. ([=]!:uuid:1111/$public)($do/$get)=markus/$ref/([=]!:uuid:1111/$public)($do/$get)[=]!:uuid:1111
2. [=]!:uuid:1111/$public/($do/$get/(=markus/$ref/[=]!:uuid:1111))
3. ([=]!:uuid:1111/$public)$do/$get/(=markus/$ref/[=]!:uuid:1111))
4. [=]!:uuid:1111/$public/(($do/$get)=markus/$ref/($do/$get)[=]!:uuid:1111))
In 1. the first inner root is in normal notation, and the second inner root is in normal notation.
In 2. the first inner root is in short notation, and the second inner root is in short notation.
In 3. the first inner root is in normal notation, and the second inner root is in short notation.
In 4. the first inner root is in short notation, and the second inner root is in normal notation.