Hey Sabar and Craig,
@Sabar - We appreciate your in interest in making better maps for Iraq. Yes, a locality is a part of the city. A locality is an urban entity which can consist of several housing colonies. However, these localities cannot be subdivisions of other localities, but have an official name.
While, a Sub-locality is a relatively small section of a city, such as a neighborhood, housing colony, or development that has it’s own official name or local name. Unlike locality, a sub-locality feature can exist under a sub-locality.
Hope this clarifies. Please let me know if still have questions.
Thanks,
~Rahim