[CF-metadata] CF compliant Graphics?

[Jonathan Gregory]

> I think this is a reasonable approach to recommend to developers who
> have to deliver software that must be feature-complete fairly soon,
> but it can obviously result in diverging conventions and loss of
> interoperability if we don't agree on the needed additions.

This instance underlines the need for us to develop better and quicker ways of
making decisions about CF, as should be discussed at the GO-ESSP meeting I
hope, for instance.

Jonathan