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Delegation can be represented as a vector in a Cartesian plan (X-axes: Level of trustworthiness between the delegator and delegated agent, Y-axes: level of delegation, based on the iterative process of the protocol), which has initial point (delegator), a terminal point (delegated agent), a length and a direction. 
The following picture shows the Cartesian plan representing a person-self sharing constellation: 
The level of trustworthiness of UMA actors is calculated based on trustworthiness factors. For instance, in the person-self sharing constellation, we assume that the distance between Authorization Manager (AM) and Authorizing User (AU) is equal to 0, this is the highest level of trust that AU relays on AM, considering all the trustworthiness factors (qualitative and quantitative), which are evaluated during the Bootstrapping trust phase.
In the picture are represented the following delegation