  In the domain of Autonomic and Organic Computing, the entities of a
distributed system are variable as well as the efficiency and the intention of
their work. Therefore, a scalable mechanism to incentivise/sanction entities
which contribute towards/against the system goal is needed. Trust is a suited
metric to find benevolent entities. In this paper, we focus for one on the
SimTrust model which introduces trust on entities when they share interest and
opinions using tagging information. The second model is the Weighted Simple
Exponential Smoothing Trust metric (WSES) which functions on explicitly rated
items. WSES follows two basic rules which ensure a logic rating mechanism. When
putting these two models in context, SimTrust has advantages on items that have
not been rated yet or can not easily be rated. WSES is a trust metric which
returns good results on explicit rank values. We propose concepts on combining
both approaches and state in which cases they are incompatible.
