public List<DocumentBean> GetSchemas()
 {
     DocumentBean bean = null;
     List<DocumentBean> list = new List<DocumentBean>();
     String sql = this.builSelectSQLStatement(DocumentBean._TABLE_NAME,
                                              new String[] { "*" },
                                              new String[] { DocumentBean._DOCUMENT_TYPE_ID });
     OleDbParameter[] dbParams = { CreateParameter(DocumentBean._DOCUMENT_TYPE_ID, (int)dbDocument.DocumentType.XML_SCHEMA ) };
     OleDbDataReader reader = ExecuteSqlQuery(sql, dbParams);
     if (reader != null)
     {
         while (reader.Read())
         {
             bean = new DocumentBean();
             bean.load(reader);
             list.Add(bean);
         }
         reader.Close();
         reader.Dispose();
     }
     return list;
 }