ST_InitTopoGeo — Creates a new topology schema and registers it in the topology.topology table.
text ST_InitTopoGeo(varchar  topology_schema_name);
This is the SQL-MM equivalent of CreateTopology. It lacks options for spatial reference system and tolerance. it returns a text description of the topology creation, instead of the topology id.
Availability: 1.1
            
 Questo metodo implementa la specifica SQL/MM.  SQL-MM 3 Topo-Geo and Topo-Net 3: Routine Details: X.3.17
SELECT topology.ST_InitTopoGeo('topo_schema_to_create') AS topocreation;
                      astopocreation
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 Topology-Geometry 'topo_schema_to_create' (id:7) created.