Getting error while creating model error

Question

Hello
Iam hitting folowing error while creating the model
created new table with this command
SQL> CREATE TABLE health_rdf_data (id NUMBER, triple SDO_RDF_TRIPLE_S);
Table created.
for create model
SQL> EXECUTE SDO_RDF.CREATE_RDF_MODEL('health', 'health_rdf_data', 'triple');
then i hitting this following error
ERROR at line 1:
ORA-06550: line 1, column 7:
PLS-00905: object SEMANTIC.SDO_RDF is invalid
ORA-06550: line 1, column 7:
PL/SQL: Statement ignored
please suggest me clear this error
thanking you,
Madhan.

Answer 1

could you do the following and let me what is the results?
select * from mdsys.rdf_model$;