Column Definitions
The basic attributes of a column are the name of the column, the data type, whether the column is a primary key, and the internal name. The connector uses the internal name to extract nodes from CSV with no readable names.
Mark up column attributes in the api:info block of the schema file. You can set the internal name in the other:internalname property. You can also specify the format of the resulting column value with other:valueFormat.
To see the column definitions in a complete example, refer to Modeling CSV Data.
<api:info title="CSVPersons" desc="Parse the CSV Persons feed.">
<attr name="ID" xs:type="int" key="true" />
<attr name="EmployeeID" xs:type="int" other:internalname="employee_id" />
<attr name="Name" xs:type="string" />
<attr name="TotalExpense" xs:type="double" />
<attr name="HireDate" xs:type="datetime" />
<attr name="Salary" xs:type="int" />
</api:info>
Defining the internal name
The other:internalname property is used to specify the CSV column name that selects the column's value from CSV. So, if the CSV file contains a column name employee_id you use other:internalname="employee_id"