Here are the data structures with brief descriptions:

Cell
Chart
Component
Contact
DateC
DatePicker
db
Feed
FeedItem
Form
Group
HiddenEntry
HiddenRow
Holiday
Incident
Label
MagpieRSS
Mailbox
MIME_mail
mime_parser_class
nusoap_base
nusoap_client
nusoap_client_mime
nusoap_fault
nusoap_parser
nusoap_server
nusoap_server_mime
nusoap_wsdlcache
nusoap_xmlschema
nusoapservermime
OriginalChart
Person
rfc822_addresses_class
Row
RSSCache
SingleLineEntry
Site
SitEntity
Snoopy
soap_fault
soap_parser
soap_server
soap_transport_http
SoapStatus
soapval
Status
StatusItem
Task
Trigger
TriggerEvent
User
wsdl
wsdlcache
XMLSchema