1. Is the expression a proper name for a particular person or place?
2. Does it contain muḍāf and muḍāf ilayh? Then it is an iḍāfa compound.
3. Has an entire clause become a name? Then it is an isnādī compound.
If the name is a blend with neither iḍāfa nor predication, consider the book’s diptote rule for mazjī compounds.