How can you add new structures to the game using Data Pack?

According to the Minecraft wiki, in 1.13 is possible to add new structures to the game using Data Packs:The data pack system provides a way for players to further customize their Minecraft experience. Data packs can be used to override or add new advancements, functions, loot tables, structures, recipes and tags without any code modification.But the wiki does not explain how to do it...Can you explain me step by step how to do it? If possible, don't take anything for granted, since I'm new to Data Packs in general. via /r/Minecraft https://ift.tt/2lkYjyc