This topic explains options for importing catalog data between e-commerce sites, including the addition of metadata in multiple languages.
Classes in this topic are in the following namespaces:
You should not import data directly into the catalog system database unless you have a full understanding of how it works.
You can import catalog data using these methods.
Through the import/export API
Use the Optimizely [Service API](🔗) to import the catalog XML.
## Catalog data from another Optimizely Commerce site
If you are moving a catalog from another Optimizely Commerce site to your Customized Commerce site, a catalog import and export feature uses XML to make this task straightforward.
## Catalog data from a non-Optimizely Commerce site
If moving data from a non-Optimizely Commerce site to a Customized Commerce site, you can use the catalog CSV import feature. The CSV import requires you to map fields from the non-Optimizely Commerce catalog system to matching catalog metadata fields in the target Customized Commerce site. This can be problematic because catalog system metadata fields may differ from one implementation to the next, depending on how the catalog system is configured.
## Manage versions when importing
To improve performance by eliminating previous versions, see the blog post [Clear version history for saved catalog content](🔗) by Magnus Rahl.