I am confused about the difference between the Map Server WFS and Feature service !
Does Map Server WFS allows deletes/ updates, ... ??
Does it server Json or not ?
See the wfs spec: Web Feature Service | OGC
WFS returns XML. WFS can return data in a number of formats using the output_type parameter, at least in geoserver. I see another post on the forum today about json output.
There's a flavour of WFS called WFS-Transational (WFS-T) that allows CrUD operations. Boundless : Developing OGC Compliant Web Applications with GeoExt : 3.3. Committing Feature Modifications Over WFS-T
Retrieving data ...