How to handle user defined data types, etc. defined at the back-end on the Business layer

SAP BO 4.0
Back-end: Oracle 11g.

Data source: Oracle 11g examples(HR & OE Data Schemas)

Issue description:
How to handle following datatypes

1. Custom Data types defined at the back-end.
2. MDSYS.SDO_GEOMETRY
3. SYS.XMLTYPE
4. "INTERVAL YEAR(2) MONTH" or "Interval Day to Sec"

These are the data type of the columns specified at the back-end.

When the Business layer's integrity is checked for "Table Structure" and "Business Objects expression" i get the errors(Image attached) stating "Undetermined data type" for and "Incorrect Data type".

Has anyone experienced this and how were these data types handled?

I'm new to Business Intelligence Platform and decided to begin with designing Semantic layer based on Oracle Schema Examples. Please guide.