Here are the data structures with brief descriptions:

WPDKAjax
WPDKArray
WPDKCapabilities
WPDKCapability
WPDKColors
WPDKCron
WPDKCronController
WPDKCronSchedules
WPDKCrypt
WPDKDateTime
WPDKDynamicTable
WPDKDynamicTableView
WPDKError
WPDKFilesystem
WPDKGlyphIcons
WPDKHeaderView
WPDKHTML
WPDKHTMLTag
WPDKHTMLTagA
WPDKHTMLTagButton
WPDKHTMLTagFieldset
WPDKHTMLTagForm
WPDKHTMLTagImg
WPDKHTMLTagInput
WPDKHTMLTagInputType
WPDKHTMLTagLabel
WPDKHTMLTagLegend
WPDKHTMLTagName
WPDKHTMLTagSelect
WPDKHTMLTagSpan
WPDKHTMLTagTextarea
WPDKjQuery
WPDKjQueryTab
WPDKjQueryTabsView
WPDKjQueryTabsViewController
WPDKListTableModel
WPDKListTableViewController
WPDKMail
WPDKMailPlaceholder
WPDKMath
WPDKMenu
WPDKMetaBoxContext
WPDKMetaBoxPriority
WPDKMetaBoxView
WPDKObject
WPDKPlugin
WPDKPlugins
WPDKPost
WPDKPostMeta
WPDKPosts
WPDKPostStatus
WPDKPostType
WPDKPreferences
WPDKPreferencesBranch
WPDKPreferencesImportExport
WPDKPreferencesView
WPDKPreferencesViewController
WPDKRecurringCron
WPDKResult
WPDKResultType
WPDKRole
WPDKRoles
WPDKScreenHelp
WPDKShortcode
WPDKSingleCron
WPDKStatus
WPDKSubMenu
WPDKSubMenuDivider
WPDKTerm
WPDKTerms
WPDKThemeCustomize
WPDKThemeCustomizeControlType
WPDKUI
WPDKUIAlert
WPDKUIAlertType
WPDKUIComponents
WPDKUIControl
WPDKUIControlAlert
WPDKUIControlButton
WPDKUIControlCheckbox
WPDKUIControlCheckboxes
WPDKUIControlChoose
WPDKUIControlCustom
WPDKUIControlDate
WPDKUIControlDateTime
WPDKUIControlEmail
WPDKUIControlFile
WPDKUIControlHidden
WPDKUIControlLabel
WPDKUIControlNumber
WPDKUIControlPassword
WPDKUIControlPhone
WPDKUIControlRadio
WPDKUIControlSection
WPDKUIControlSelect
WPDKUIControlSelectList
WPDKUIControlsLayout
WPDKUIControlSubmit
WPDKUIControlSwipe
WPDKUIControlSwitch
WPDKUIControlText
WPDKUIControlTextarea
WPDKUIControlType
WPDKUIModalDialog
WPDKUIPopover
WPDKUIPopoverPlacement
WPDKUser
WPDKUserMeta
WPDKUsers
WPDKUserStatus
WPDKView
WPDKViewController
WPDKWarning
WPDKWidget
WPDKWordPressAdmin
WPDKWordPressPaths
WPDKWordPressPlugin
WPDKWordPressTheme