Sets the publicId to the public object
        @param publicId: a publicId (title of article)
        @type publicId: string

def set_publicId(self,publicId):
        '''
        Sets the publicId to the public object
        @param publicId: a publicId (title of article)
        @type publicId: string
        '''
        publicObj = self.get_public()
        if publicObj is not None:
            publicObj.set_publicid(publicId)
        else:
            publicObj = Cpublic()
            publicObj.set_publicid(publicId)
            self.set_public(publicObj)