BankingBalance schema amortisedLimit field

Question

In the Consumer Data Standards (CDS), within the BankingBalance schema, amortisedLimit is an optional field with description:

"Object representing the available limit amortised according to payment schedule. Assumed to be zero if absent"
Is the expected data in amortisedLimit field the difference between what has been paid off and the initial borrowed amount? For example, a customer has a home loan account of $500,000 and is scheduled to be paid off in 20 years and there is a minimum repayment each month. After 5 years, the customer paid off $100,000, loan amount remaining is $400,000, so in this case;

• What should be the value for amortisedLimit field?
• Is the expectation that this field is populated for any loan product that is amortised?

Answer

Thus far, the Data Standards Body (DSB) has not been requested to clarify the exact intent of this field. This field including its name and description was introduced in the CDS at the request of NAB in 2018 under the following consultation:
https://github.com/ConsumerDataStandardsAustralia/standards/issues/39

The value of amortisedLimit is left to the interpretation of the Data Holder.

Note: If the answer above is unsatisfactory, then the DSB would recommend registering a change request to expand on the description of this field in standards maintenance. This will lead to further investigation and allow for a detailed industry conversation on how the field should be populated and utilised.