The service document describes the resources available for a
particular account. Each Constant Contact account has its own service
document because the resources available may vary depending on which
applications the account uses and what permissions have been granted to
the application using the API.
In Atom terminology, a service document describes a Workspace. This one describes the Constant Contact Web Services Customer Workspace. This workspace contains two Collections, called Contact Lists and Bulk Activity. For each collection, the href attribute specifies the collection's URI and the accept element(s) specify the type(s) of documents the collection will accept when creating a new entry. Section 8 of RFC 5023
describes the format of a service document in detail. The
documentation page for each collection type will describe the detailed
HTTP request and response formats.