Based on the flag of the Georgian SSR (since they aren't using it anymore ;P). The gold sun can represent the Iranian culture and language of the Ossetians (similar to the Lion and Sun and the flag of Kurdistan [see also this design for Tajikistan). The black bar represents the Caucasus (which divided the Ossetians between north and south). The coloring also resembles the flag of the Transcaucasian Democratic Federative Republic.
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