What is type tag and how to define them

At the type level Akwatype allows to declare tags to add information to a type

Tags are introduced by the @ character e.g. @Localisation, @ISO ...

type _Address {
    @Localisation
    street:String
    city:String 
    zipcode:String
    country:_Country
}

type _Country{
    @ISO
    codeISO:String
    label:String
}

Tags are displayed under the type name 

Entity tags are propagated to facades based on that type.

facade AddressDTO on _Address{
    street
    city
    zipcode
    country:country.label
}

Show tags

To display the type tags, click on the tag management button, on the right of the screen where the graph is displayed, and select the tags you want to see displayed (in the Entity tag(s) field)