Standard XSD & Issue in import

Hi,

We are doing an PI interface to US Food & Drugs Administration (FDA) for submitting medical devices information. US FDA has provided a XSD & expecting the XML in that structure. When I import the XSD (attached as a text) as external definition into PI there are few elements which are marked as red& those structures become infinite recursive (attached is the screenshot) and not able to use them in mapping which gives Java Heap Size error.

Is there any way this behavior can be corrected with the XSD? Any pointers on this will be helpful.

Regards

Prem A