Direct (ḥaqīqī) naʿt: the quality belongs to the described noun itself: جَاءَنِي رَجُلٌ عَالِمٌ.
Relational (sababī) naʿt: the quality belongs to something related to that noun: جَاءَنِي رَجُلٌ عَالِمٌ أَبُوهُ.
The man is the matbūʿ/manʿūt; in the second case the father is the related noun.
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The Tawābiʿ and Naʿt: Direct and Relational Attributes
Direct (ḥaqīqī) naʿt: the quality belongs to the described noun itself: جَاءَنِي رَجُلٌ عَالِمٌ.
Relational (sababī) naʿt: the quality belongs to something related to that noun: جَاءَنِي رَجُلٌ عَالِمٌ أَبُوهُ.
The man is the matbūʿ/manʿūt; in the second case the father is the related noun.