Create a relation data object, using the given relational schema object, with
the resulting relations empty and ready for data insertion using
insert.
create(x, ...)An instance of the schema. For example, calling create on a
database_schema creates a database, where all
the relations contain zero records.
a relational schema object, representing the schema to create an
instance of, such as a relation_schema or
database_schema object.
further arguments passed on to methods.