ABAP to XML

Hello,

I want to get this format XML from a ABAP structure:

<Contact>1234567801<Contact>

<ContactTypeIdentifier>VKN_TCKN<ContactTypeIdentifier>

<ContactInformation>

I tried CALL TRANSFORMATION, but I only got this format:

<CONTACT>1234567801<CONTACT>

<CONTACT_TYPE_IDENTIFIRER>VKN_TCKN<CONTACT_TYPE_IDENTIFIRER>

<CONTACT_INFORMATION>

My question is: how can I get XML from a ABAP structure which the structure's component name will convert case sensitively.

For exemple: CONTRACT_INFORMATION  to ContractInformation

thank you very much

Regards,

Rong