private string ExecuteFileQuery(string fileName, string param)
        {
            string sparqlCommandText = File.ReadAllText(fileName).Replace("{0}", param);

            RdfQueryViewModel queryModel = new RdfQueryViewModel();

            queryModel.AddRdfFile("FdoDS.rdf");
            queryModel.AddRdfFile("schema.xml");
            queryModel.AddRdfFile(this.rdfOutputFileName);
            return(queryModel.ExecuteQuery(sparqlCommandText));
        }
        private string ExecuteFileQuery(string fileName, string param)
        {
            string sparqlCommandText = File.ReadAllText(fileName).Replace("{0}", param);

            RdfQueryViewModel queryModel = new RdfQueryViewModel();
            queryModel.AddRdfFile("FdoDS.rdf");
            queryModel.AddRdfFile("schema.xml");
            queryModel.AddRdfFile(this.rdfOutputFileName);
            return queryModel.ExecuteQuery(sparqlCommandText);
        }