type

Type:
<string> | <string[]>

Default: 'auto'
Values:
'audio' | 'author' | 'auto' | 'boolean' | 'date' | 'description' | 'email''image' | 'ip' | 'lang' | 'logo' | 'number' | 'object' | 'publisher' | 'regexp' | 'string' | 'title' | 'url' | 'video'
It defines how the value extracted should be considered.
The data shape ensures that the extracted value will only be considered as valid when it's of the declared shape.