Learn Farsi: طبقه‌بندی سرنخ‌های بصری نظیر نقشه مهم است. - The classification of visual clues such as the map is important.

It uses the ezafe connector, becoming nazir-e. This is exactly how you link the preposition "such as" to the example word, which in this case is naqshe (map).

How is the word for "clues" (sar-nakh-ha) constructed?

The singular noun is sar-nakh, which literally means "the head of the thread" (sar meaning head, and nakh meaning thread). It is a common compound word used to mean a "clue" or "lead" in a problem or investigation.

Let's review the ezafe chain at the beginning of the sentence. Why does tabaqe-bandi take a -ye sound?

The phrase translates to "classification of visual clues". Because tabaqe-bandi (classification) ends in the long vowel "i", the ezafe requires the consonant "y" as a bridge to avoid putting two vowels together, making it tabaqe-bandi-ye. It then connects to sar-nakh-ha-ye basari (visual clues).

Could we use az qabil-e instead of nazir-e here?

Yes, they are highly synonymous. Both nazir-e and az qabil-e mean "such as" or "including" and belong to a similar formal register. You can seamlessly swap them in this sentence to introduce the example.