Hi,

you can use the Digitizing Tools Plugin "Cut with polygon from another layer" tool to achieve this. Load the layer twice into QGIS one is for editing, the other to cut with.
Backup your data until you know how the tool works.

Bernhard

Am 27.05.2014 11:05, schrieb Paolo Antonelli:
i'm apologize, I meant to say a difference


2014-05-27 10:44 GMT+02:00 G. Allegri <[email protected]
<mailto:[email protected]>>:

    What do you mean with "splitting"?
    Do you mean perform difference? E.g. make polygon id=1 become a
    polygon with a hole defined by polygon with id=2?
    Or do you mean splitting into several layers?

    giovanni


    2014-05-27 10:39 GMT+02:00 Paolo Antonelli
    <[email protected] <mailto:[email protected]>>:

        Hi,

        i have a polygonal shapefile consists of 10 concentric areas.
        The column ID of this shp identifies these 10 polygons.


        Immagine in linea 1



        There is a feature that allows you to split each polygon based
        on the remaining polygons, using the field ID?
        In this case, for several reason, I cannot use "Delete ring"

        Many thanks,
        paolo

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