YAML

YAML Ain't Markup Language:

1. YAML uses indentation to distinguish layers (same indentation - same layer) - use spaces, because tabs are not allowed.
2. YAML start with three dashes: ---
3. YAML disctionary in key-value pair in one of two forms:
1. colon separated key (like Python dictionary):
1. key: value
2. indentation separated key:
1. key:
2.       value
3. Also one key can contain nested dictionary:
1. Method 1:
1. first_level_key:
2.    second_level_key_under_the_first_level: second_level_value
2. Method 2:
1. first_level_key: {second_level_key_under_the_first_level: second_level_value}
4. YAML uses dashes as indentation to represent list of items (use lists when you want key to have more than one values which are not keys themselves):
1. Methos 1:
1. this_is_a_list:
2.  - element_1
3.  - element_2
2. Method 2:
1. this_is_a_list : [element_1, elemenet_2]