* the singleton instance of this class.
*/
private RepositoryTags()
{
// construct the mapping table
table = new DoubleHashtable();
table.put("descriptor-repository", new Integer(MAPPING_REPOSITORY));
table.put("version", new Integer(REPOSITORY_VERSION));
table.put("isolation-level", new Integer(ISOLATION_LEVEL));
table.put("jdbc-connection-descriptor", new Integer(JDBC_CONNECTION_DESCRIPTOR));
table.put("platform", new Integer(DBMS_NAME));