Component(s)

pkg/ottl

Is your feature request related to a problem? Please describe.

OTTL can directly set severity number and text, but it would be nice if there was an optimized function for interpreting values. Stanza currently has a dedicated severity interpreter which has a couple advantages over using OTTL:

1. Configuration is simple. The user can specify a mapping of values, ranges, or pre-defined categories, along with the level to which these values should be interpreted.
2. Performance costs is almost entirely paid for at startup by building a full mapping which can then be used for instant interpretation of any value.

Describe the solution you'd like

The primary challenge with OTTL is that its functional nature may not lend itself well to specifying mappings. I'm not sure if there is a way to do this today, but I'd like users to be able to specify a function that contains an arbitrary number of mapping options. e.g. ParseSeverity(attributes["sev"], AsError("err", "error", "NOOO"), AsInfo("info", "hey"), AsInfoRange(1, 100), ...)

Describe alternatives you've considered

No response

Additional context

No response