?? wrote:

I'm new to mozilla app dev. I want to manipulate a rdf seq container through nsIRDFContainerUtils interface, I just asserted a statement and query for it, but the result is always "false". Could anyone show me some light on this problem? Thank you.

    function test(){
    var rdfService=Components.classes["@ mozilla.org/rdf/rdf-service;1
    <http://mozilla.org/rdf/rdf-service;1>"]
    .getService(Components.interfaces.nsIRDFService);
    var rdfCUtils=Components.classes["@
    mozilla.org/rdf/container-utils;1
    <http://mozilla.org/rdf/container-utils;1>"]
    .getService()
    .QueryInterface(Components.interfaces.nsIRDFContainerUtils);
    var
    
dataSource=rdfService.GetDataSource("chrome://encodinglock/content/encodingMapping.rdf");


RDF loaded from a chrome URL is read only.

/ Neil

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