@base <http://www.example.com/a/b> .
@prefix t: <../c/> .
@prefix  rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .

<../c/s>    a t:Class .
<../../c/s> a t:Class .
<.././c/s>  a t:Class .
<..//c/s>   a t:Class .
</c>        a t:Class .