* Subject Area: While a PhD can be awarded across a vast range of disciplines, the DLitt et Phil at UNISA historically signified research within the humanities (Literature) and philosophical fields. However, UNISA's current offerings likely extend beyond this strict historical interpretation. You need to check the specific programme description. The broader term, PhD, is more universally recognised across different countries.
* Nomenclature: The "DLitt et Phil" is simply a different name, a historical convention used by some South African universities. It doesn't inherently imply a difference in quality, research depth, or required standards compared to a PhD from another institution, either in South Africa or internationally. The content and requirements for a DLitt et Phil at UNISA would be equivalent to a PhD at another university in terms of research, dissertation length, and overall academic standard.
In short, if you see a UNISA DLitt et Phil, consider it functionally equivalent to a PhD from another university. The difference is largely one of name and historical context rather than academic substance. However, always check the specific program details from UNISA to confirm the level and type of research involved.