[QGIS-Developer] how compatible .qml files are ?

[Sandro Santilli]

On Wed, Aug 28, 2019 at 06:42:15PM +0200, Paolo Cavallini wrote:
> Hi Sandro,
> 
> On 28/08/19 17:43, Sandro Santilli wrote:
> > I just filed https://github.com/qgis/QGIS/issues/31471 after finding
> > out that a .qml file created with QGIS 1.9.0 is not fully honoured
> > with curretn QGIS master (and I think 3.4.0 as well).
> > 
> > Yes, I know 1.9.0 is old but... is this level of backward
> > compatibility supposed to work ? Or are there tools to convert
> > saved styles across versions ?
> 
> my understanding is that maintaining compatibility is just too hard to
> achieve, and we never promised to our users.
> What I always recommend in training and support is to convert projects
> from one version to the next, as this should be mostly handled correctly.

How are them converted ? And note we're talking about styles, not full
projects here. And styles that are shipped with QGIS itself (could
this be automated, for shipped styles?).

--strk;