Structured data, semi-structured data and unstructured data

• Structured data ： Simply put, table data , With rows and columns , Each column has schema Field description .

• Unstructured data ： picture 、 Audio 、 Video etc.

• Semi-structured data ： journal 、json、csv、xml、properties

  • Semi structured data can be converted into structured data

  • json:{id:1,name:zs}->id name

  • xml: <id>1</id> <name>zs</name >

  • properties:

    • id=1

    • name=zs