I'm using the Service API's catalog bulk import service to import a catalog via XML files. My, say, Product class has a property that is a block, and I would like to import data into the property block's properties. 

For example, say I have a Product type with an Address property that is an AddressBlock (this is not a real example)... 

[ContentType( ... )]
public class AddressBlock : BlockData
{
    [Display( ... )]
    public virtual string Line1 { get; set; }

    [Display( ... )]
    public virtual string City { get; set; }

    [Display( ... )]
    public virtual string State { get; set; }

    [Display( ... )]
    public virtual string Zip { get; set; }
}

[CatalogContentType( ... )]
public class Product : ProductContent
{
    [Display( ... )]
    public virtual AddressBlock Address { get; set; }
}

How would I import the address properties via the catalog bulk import? The XSD-generated classes aren't giving me any clues.