The order is invariably possessum-possessor. The possessor may be introduced without a preposition, by the preposition di (sometimes reduced to d' before a noun beginning with a vowel), or by
-l before a noun beginning with a consonant. This -l is not a phonotactically triggered variant of the preposition di. It only appears between noun phrases or between a heavy preposition and the following noun phrase, never in other contexts where the preposition di may appear. Examples: kása-l Pedro 'Peters house', dentu-l kása 'in the house'.
Dónu di nha bandera 'the owner of my flag' is possible and has a possessor-possessum order on the semantic level due to the lexical meaning of dónu 'owner'. However, grammatically the possessor is still nha bandera 'my flag' and the possessum dónu: 'my flag has an owner'.
Source: Lang et al. 2012
Source: Lang et al. 2012
Source: Lang et al. 2012
Source: da Silva 1987: 41