You can import new data, or import updated data from the SNX Importer form. Typically, you use Import (New) to import a full database dump from your legacy system. You use Import (Update) to import a smaller file consisting of only the changes since the last import.
Navis does not recommend using the SNX Importer form after you are live with N4, unless you want to update live data. Instead, use the appropriate view or form in N4 to enter small volumes of data, and only use the SNX Importer form for larger volumes of data.
When updating existing entities using the SNX Importer form, the following rules apply for optional attributes in the import data XML file:
If you do not specify an optional attribute, then N4 leaves the existing attribute as is.
If you specify an empty value for an optional attribute, such as id="", then N4 updates the existing attribute to an empty value or null.
If you specify a non-empty value for an optional attribute, such as id="ACME", then N4 updates the existing attribute to the value specified.