  In this work we determine the so-called minimal generating set of the
Weierstrass semigroup of certain $m$ points on curves $\mathcal{X}$ with plane
model of the type $f(y) = g(x)$ over $\mathbb{F}_{q}$, where $f(T),g(T)\in
\mathbb{F}_q[T]$. Our results were obtained using the concept of discrepancy,
for given points $P$ and $Q$ on $\mathcal{X}$. This concept was introduced by
Duursma and Park, in \cite{duursma}, and allows us to make a different and more
general approach than that used to certain specific curves studied earlier.
