[Tagging] when to use source:location?

[John Smith]

On 10 August 2010 21:43, Andrew Harvey <andrew.harvey4 at gmail.com> wrote:
> I would like to clarify some things that aren't clear on the wikipage
> for key:source.

You use source=* for where the majority of the information came from,
and source:location=* if you sourced the location differently from the
majority of the information, or at least that's what I do...