Before you can archive data in the Data Vault, each source datatype must be mapped to a Data Vault datatype. The Data Vault Loader job maps most native datatypes to an archive datatype. You must manually map custom datatypes to the appropriate archive datatype.
For example, you create a custom datatype named address for alphanumeric values with a length of 100 digits and characters. You must map the address datatype to the varchar datatype in the Data Vault. You can choose to keep the length of this field the same or increase it by a multiple of 100.