I didn't find any Oracle Docs about this 10.1.x version, but I found this old version link
I looked at ATG 10.1.1 DCS module, and it contains a CustomCatalogMigration module, so I think the document will help you.
Hope it helps
The standard catalog is removed from ATG10 onwards so all you have is (custom) catalog only. Only ATG versions prior to 10, will have standard and custom catalogs. You would have to use DCS.CustomCatalogMigration module to migrate your standrad catalog to custom catalog. Refer this
Though this is about migration from 9 to 10 but I think the standard to custom catalog migration for 10.1.x should be on the similar lines.
If you already have a standard catalog that you set up in a pre-10 release, then you need to run with DCS.CustomCatalogMigration once to convert the product catalog repository from the standard format to the custom format. Follow the instructions in the migration guide. After you've done the conversion, you should remove DCS.CustomCatalogMigration from your module mix.