The ASX exchange references IAP for Investec Australia Property Fund (IAPF), however Refinitive is referencing IAPDA. The API made this change as at 29/11/2020
I am observing a different result under permid.org with this permid at this time:
It looks like the entry has been updated since the question was asked.
However, for a definitive answer on Refinitiv content, such as on RIC naming, the best approach for a customer is to contact Refinitiv Helpdesk Online; this forum is intended for general questions and discussions centered around Refinitiv API usage. Most of the forum members are developers, the moderators of the forum are Refinitiv API experts and will not be fluent in the various types of Refinitiv content.