cubicweb-seda #14022989 export RELAXNG [validation pending]

plutôt que XSD

priorityimportant
typeenhancement
done in0.4.0
load left0.000
closed by#a68075226224 [ui] Add an action to expose RNG export. Closes #14022989
patch[ui] Add an action to expose RNG export. Closes #14022989 [applied][profile gen] First shot of a RelaxNG export [applied][test] Rework test so they can be actually shared with RelaxNG cases [applied][profile gen] Preparatory refactoring [applied]