If you don't state the attribute type explicitly, the type "string" is exported.
The following examples show different type declarations:
Integer
Incorrect value for type "Integer": '0' is displayed.
attr1=?"1.5" attr1.custom=integer
String
attr2=?"2, test, 1234 und 56789" attr2.custom=string
Real number
attr3="3,7890" attr3.custom=double
Activate checkbox in the column "Designate"
attr4="4" attr4.custom=designated
Write protection
attr5=?"5" attr5.custom=readonly
Several type declarations can be made separated by semicolon.
attr6=?"6" attr6.custom=double;designated