Defining Unrecognized GEDCOM Tags
The Supported GEDCOM Tags window shows all the information tags supported by Legacy. To map the unrecognized tag to one in the list, highlight the tag and click Select. When the GEDCOM file is imported, the information in the remapped tag will be placed in the new tag field.
If you don't know what kind of information the unrecognized tag contains, it may be a good idea to remap it to the Legacy NOTE tag.
This window is displayed when an unrecognized item is found while analyzing a GEDCOM file.