could you share your experience to use DM_NESTED_CATEGORICAL & DM_NESTED_NUMERICAL variable types? I create a view with DM_NESTED_CATEGORICAL variable type but I don't see this variable listed in target, case id in SVM classification model. I create data view based on below query.
CAST(collect(DM_NESTED_CATEGORICAL(product_code,USER_TYPE)) AS DM_NESTED_CATEGORICALS) CUSTOMER_PRODUCT
group by ccustomer_key,country_name,industry,segment
order by customer_key
DM_NESTED_CATEGORICAL & DM_NESTED_NUMERICAL can not be used for the target or case id in building models.
They can be used as predictor (input column) for most of the ODM models.