What You Can Check
Acrolinx for Oxygen XML Web Author checks your XML and DITA documents.
DITA Maps and References
Acrolinx for Oxygen XML Web Author supports DITA map checks. When you check a DITA map, the Sidebar doesn't highlight issues in the text or replace issues for you. The cards give you all the information you need to correct your content. And you can edit your issues directly and use all the other features of the Sidebar.
Supported DITA references:
DITA reference and DITA map support is available starting with Core Platform 2019.10, but you'll get the best results with Core Platform 2020.03 and later.