Gets or creates a pre-defined type.

  Gets or creates a pre-defined type.

This is just a short-cut of
createDatatypeBuilder(typeLocalName).createDatatype();

The callee should throw a DatatypeException in case of an error.
Returns: A non-null valid datatype object.

  Creates a new instance of DatatypeBuilder.

  Creates a new instance of DatatypeBuilder.

The callee should throw a DatatypeException in case of an error.
Returns: A non-null valid datatype object.
Parameters:
- baseTypeLocalName - The local name of the base type.