To specify a default element to use for unmapped character formats:
; DefCharElem = element for Frame char formats that are not
; mapped in [DITACharTags], default is "ph"
If your configuration file does not include a value for DefCharElem, Mif2Go uses one of the following as the element for an unmapped format: if UseFormatAsTag=Yes and the FrameMaker format name (adjusted as for CSS class names) matches the name of a valid element in the current content model, the format is mapped to that element; otherwise, the format is mapped to ph, the default value of DefCharElem. See §15.4.2 Treating FrameMaker format names as DITA element names.