Para ir de
P12104001;example_01_01,
P12104002;example_02_01,
P12104003;example_03_01,
P12104004;example_04_01,
para isso
P12104001;example_01_01,
<example_02_01>,
<example_03_01>,
P12104004;example_04_01,
use
:/002/,/003/s/.*\(example_.._..\)/<>/
que lê como
: Command
/Start of section/,/End of section/
s/ substitute
.* all chars up to
\(string to remember . for wild chars\)
/< with
put in the remember string
>/ rest of replacement.
Use: ajude o endereço no Vim para ver outras formas de abordar os intervalos de linha.