YAML

 
 Advantages:   Human-readable.  Has lots of data types.

  Overall:  Unlike JSON, the YAML format looks more like how someone would write down structured
data on paper. It was designed specifically to be easier for humans to read. 

  Uses: I used YAML for deployments scripts for CI/CD pipelines and releases in 
Microsoft's Azure when I worked at QuikTrip. I have used YAML for settings and 
data that were used by programs written in different languages.  

  Other similar things: YAML is very similar to XML or JSON in its purpose.

  Overall Implementation: It uses the following:
    Indentation to represent objects
    Colons to separate key-value pairs
    Hyphens for arrays
    Hashes to denote a comment

YAML was originally built to simplify XML.

 doe: "a deer, a female deer"
 ray: "a drop of golden sun"
 pi: 3.14159
 xmas: true
 french-hens: 3
 calling-birds:
   - huey
   - dewey
   - louie
   - fred
 xmas-fifth-day:
   calling-birds: four
   french-hens: 3
   golden-rings: 5
   partridges:
     count: 1
     location: "a pear tree"
   turtle-doves: two
   
# This is a full line comment
foo: bar # this is a comment, too
 

Advantage to YAML is all the different built in data types. More than many computer languages.

  
YAML supports several other numeric types. An integer can be decimal, hexadecimal,
or octal. YAML supports both fixed and exponential floating point numbers.
YAML not-a-number (NAN) or infinity.

YAML treats the \n as two characters such as:
bar: this is not a normal string\n

YAML handles nulls with a tilde(~) or the unquoted null string literal:
foo: ~
bar: null

YAML arrays can be done in braces or multiple lines with preceeding dash:
items: [ 1, 2, 3, 4, 5 ]
names: [ "one", "two", "three", "four" ]    
items:
  - 1
  - 2
  - 3
  - 4
  - 5
names:
  - "one"
  - "two"
  - "three"
  - "four"

 

NOTE - See the blog on YAML with Azure.