I've seen a lot of reagents which have a slash between two compounds, such as Lindlar's catalyst which is $\ce{H2}$ along with $\ce{Pd|BaSO4}$. I know that the sulphur is a poison here but in general, what does the \ or | mean? And is it supposed to be a \ or a |? Are both equivalent? Does it mean "and" or "or" or something else?
$\ce{Cr2O3-Al2O3/Mn2O3}$, Also what does the dash mean here? In?
EDIT: This in the context of the reagents mentioned above arrows in organic chemistry. If I'm not wrong, $\ce{Cr2O3-Al2O3/Mn2O3}$ is used to convert hexane to benzene by cyclization followed by aromatization.