When using the system meta data import functionality, the entire definition is replaced. For example, suppose you have a custom group with three attribute groups and you want to add another attribute group to make four attribute groups. In this case, specify all four attribute group definitions in the import file.
This section describes the elements in the metadata.xsd and considerations when creating values for them.
The custom-attribute-definitions,
attribute-definitions, and attribute-definition elements
use the complexType.CustomAttributeDefinition type, which allows you to set
the externally-managed-flag and externally-defined-flag.
However, you can only import the externally-managed-flag and
externally-defined-flag elements via the ImportCatalog; they don't import
if you do the import manually in Business Manager.
Granularity: organization's custom object type definitions.
Business Manager Import Location
Pipelets
ExportMetaData
Granularity: organization's custom object type definitions