Resolving topic references through an XML catalog

If you customized your map to refer topics using URI's instead of local paths or you have URI content references in your DITA topic files and you want to resolve the URIs with an XML catalog when the DITA map is transformed then you have to add the catalog to <oXygen/>. The DITA Maps Manager view will solve the displayed topic refs through the added XML catalog and also the DITA map transformations (for PDF output, for XHTML output, etc) will solve the URI references through the added XML catalog.