Hi everybody,
for one of our project, we would need some basic support of rendering
transformations in the GetFeatureInfo WMS request.
What we currently need is, for vector layers only, to apply the rendering
transformation to the final FeatureCollection just before the output is
created.
This is needed because we have a transformation adding new attributes to
the original feature, and we need those attributes to be rendered in the
gfi result.
I currently have a patch that checks, only if the original feature is a
vector layer, if the given style has an applicable Transformation (and no
more than one) and applies it to the final FeatureCollection.

My only concerns are:
 * is this partial implementation useful for the community?
 * is the desiderd behaviour to have the transformation applied (I
obviously think it is)?
 * should we enable transformations using a vendor param, or apply them by
default?

Suggestions are welcome.

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Dott. Mauro Bartolomeoli
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Senior Software Engineer

GeoSolutions S.A.S.
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