When you connect to Mailchimp the first time, dotConnect for Mailchimp needs to retrieve metadata and map objects to the relational tables. This process is complex and can take some time, so to avoid retrieving the metadata each time when connecting, dotConnect for Mailchimp caches the metadata.
Objects are mapped to tables; their fields, including ID, system, and calculated fields, are mapped to the table columns. Master-Detail relationships between objects are mapped to foreign keys between tables.
There are two ways to access metadata with dotConnect for Mailchimp: using the GetSchema method of MailChimpConnection or querying the information schema tables, both are described in the corresponding topics: Information Schema and Using GetSchema Method.
If you want to get fresh metadata updates from Mailchimp, use the RefreshMetadata method of the connection object. It deletes existing caches, and the metadata will be queried again next time when they are needed.