String aRevisionNumber=aElement.getAttributeValue("revisionNumber");
String aSubject=aElement.getAttributeValue("subjectUri");
String aAction=aElement.getAttributeValue("actionUri");
boolean aInheritable=new Boolean(aElement.getAttributeValue("inheritable")).booleanValue();
boolean aNegative=new Boolean(aElement.getAttributeValue("negative")).booleanValue();
return new NodePermission(aUri,aRevisionNumber,aSubject,aAction,aInheritable,aNegative);
}