[pplonski86]

Mercury was inspired by R Markdown where YAML is used. I think that YAML is quite easy way to quickly define simple User Interface.

[phillc73]

This is also similar to the header formatting for Weave.jl, markdown for Julia.[1] This is probably also inspired by R markdown, but I mention it because it seems to be a reasonably common practice in tools for the data science field.

[1] http://weavejl.mpastell.com/stable/header/#Header-Configurat...