A Contact List is updated by issuing an HTTP PUT to the entry's URI. The PUT body must contain an Atom entry element with the changed content for the list. The Atom entry must include an <id> tag and that
id must reflect the URI of the list you are updating, for example, if
you want to update the list in the 'Create' example above, this line is
As a general rule, your "PUT" entry should include all of the content
you receive in "GET" for the resource you are updating. It may be
simplest to "GET" the resource you would like to update, then change
only the fields you want to update and "PUT" the updated resource back.
The API will ignore read only fields (such as update time) and your
entry will be complete.