This inheritance list is sorted roughly, but not completely, alphabetically:

[detail level 12345]

AbstractStm
AbstractStmControl
AbstractStmElement
AdministrationPlugin
AbstractStudIPAdministrationPlugin
AdminList
AdminNewsController
ArrayAccess
Config
UserConfig
Request
SemClass
SemType
SessionDecoder
SimpleORMap
AdmissionApplication
ArchivedCourse
ArchivedCourseMember
AuthUserMd5
User
Banner
ConfigEntry
Course
CourseMember
CronjobLog
CronjobSchedule
CronjobTask
Datafield
DatafieldEntryModel
Institute
InstituteMember
Kategorie
LockRule
NewsRange
PersonalNotifications
RoomRequest
Semester
SemesterHoliday
SeminarCycleDate
StudipAdmissionGroup
StudipComment
StudipDocument
StudipNews
StudipScmEntry
StudipStmInstance
StudipStmInstanceElement
StudipStudyArea
UserConfigEntry
UserInfo
WebserviceAccessRule
Configuration
ArrayObject
CSVArrayObject
SimpleORMapCollection
Assets
AssignEvent
AssignEventList
AssignObject
AssignObjectPerms
Auth
Seminar_Auth
Seminar_Default_Auth
Seminar_Register_Auth
AuthorObject
DatabaseObject
EvaluationObjectDB
EvaluationAnswerDB
EvaluationDB
EvaluationGroupDB
EvaluationQuestionDB
EvaluationExportManager
EvaluationExportManagerCSV
StudipObject
EvaluationObject
Evaluation
EvaluationAnswer
EvaluationGroup
EvaluationQuestion
Vote
TestVote
VoteDB
AutoInsert
AuxLockRules
Avatar
CourseAvatar
InstituteAvatar
StudygroupAvatar
BE_Null
BE_Sql
button
Calendar
GroupCalendar
SingleCalendar
CalendarColumn
CalendarDriver
CalendarExport
CalendarExportFile
CalendarImport
CalendarImportFile
CalendarInstscheduleModel
CalendarParser
CalendarParserICalendar
CalendarScheduleModel
CalendarSynchronizer
CalendarView
CalendarWeekView
CalendarWriter
CalendarWriteriCalendar
CalendarYear
CalendarMonth
CalendarDay
DbCalendarDay
DbCalendarYear
DbCalendarMonth
Callbacks
Cart
CASUserDataMapping
CheckMultipleOverlaps
ClipBoard
Color
Compressor
ConfigurationModel
ConnectedCMS
Ilias3ConnectedCMS
Ilias4ConnectedCMS
PmWikiConnectedCMS
ConnectedLink
Ilias3ConnectedLink
Ilias4ConnectedLink
PmWikiConnectedLink
ConnectedPermissions
Ilias3ConnectedPermissions
Ilias4ConnectedPermissions
ConnectedUser
Ilias3ConnectedUser
Ilias4ConnectedUser
ContentElement
ContentModule
Ilias3ContentModule
Ilias4ContentModule
PmWikiContentModule
ContentModuleView
Countable
Config
SessionDecoder
SimpleORMap
CronJob
CheckAdmissionJob
CleanupLogJob
GarbageCollectorJob
PurgeCacheJob
SendMailNotificationsJob
SessionGcJob
CronjobScheduler
CSRFProtection
cssClassSwitcher
CT_DBM
CT_File
CT_Ldap
CT_Null
CT_Shm
CT_Split_Sql
CT_Sql
Seminar_CT_Sql
CycleData
CycleDataDB
DataFieldEntry
DataFieldBoolEntry
DataFieldComboEntry
DataFieldDateEntry
DataFieldEmailEntry
DataFieldLinkEntry
DataFieldPhoneEntry
DataFieldSelectboxEntry
DataFieldRadioEntry
DataFieldTextareaEntry
DataFieldTextlineEntry
DataFieldTimeEntry
DataFieldStructure
DateFormatter
DB_Sql
DB_USql
Query
DbCalendarEventList
DbCalendarWeek
DBConnection
DBManager
DbPermissions
DbSnapshot
DbView
DbCrossTableView
Debug
DeleteResourcesUser
DiffLine
EditResourceData
EditSettings
ELearningUtils
email_validation_class
Error
ErrorHandler
EvalCommon
EvalEdit
EvalOverview
EvalShow
EvalTemplateGUI
EvaluationTreeEditView
EvaluationTreeShowUser
Event
CalendarEvent
DbCalendarEvent
SeminarCalendarEvent
SeminarEvent
EventLog
Exception
AccessDeniedException
InvalidSecurityTokenException
CheckObjectException
DBManagerException
MediaProxyException
MethodNotAllowedException
NotificationVetoException
PluginInstallationException
PluginNotFoundException
SessionRequiredException
Exception
ExportDocument
ExportPDF
ExternConfig
ExternConfigDb
ExternConfigIni
ExternEdit
ExternEditGeneric
ExternEditHtml
ExternEditModule
ExternElement
ExternElementBody
ExternElementContact
ExternElementContentNews
ExternElementLecturesInnerTable
ExternElementLink
ExternElementLinkIntern
ExternElementLinkInternTemplate
ExternElementLinkInternSimple
ExternElementList
ExternElementLitList
ExternElementMain
ExternElementMainDownload
ExternElementMainGlobal
ExternElementMainLecturedetails
ExternElementMainLectures
ExternElementMainLecturestable
ExternElementMainNews
ExternElementMainNewsticker
ExternElementMainPersondetails
ExternElementMainPersons
ExternElementMainRangeLectureTree
ExternElementMainSemLectureTree
ExternElementMainTemplateDownload
ExternElementMainTemplateLecturedetails
ExternElementMainTemplateLectures
ExternElementMainTemplateNews
ExternElementMainTemplatePersBrowse
ExternElementMainTemplatePersondetails
ExternElementMainTemplatePersons
ExternElementMainTemplateSemBrowse
ExternElementPersondetailsHeader
ExternElementPersondetailsLectures
ExternElementPersondetailsLecturesTemplate
ExternElementRangeTreeLevelContent
ExternElementRangeTreeLevelName
ExternElementReplaceTextSemType
ExternElementSelectInstitutes
ExternElementSelectSubjectAreas
ExternElementStudipInfo
ExternElementStudipLink
ExternElementTableFooter
ExternElementTableGroup
ExternElementTableHeader
ExternElementTableHeadrow
ExternElementTableParagraph
ExternElementTableParagraphHeadline
ExternElementTableParagraphSubHeadline
ExternElementTableParagraphText
ExternElementTableRow
ExternElementTableRowTwoColumns
ExternElementTemplateGeneric
ExternElementTreeBackLink
ExternElementTreeKids
ExternElementTreeLevelContent
ExternElementTreeLevelName
ExternElementTreePath
ExternError
ExternModule
ExternModuleDownload
ExternModuleGlobal
ExternModuleLecturedetails
ExternModuleLectures
ExternModuleLecturestable
ExternModuleNews
ExternModuleNewsticker
ExternModulePersondetails
ExternModulePersons
ExternModuleRangeLectureTree
ExternModuleSemLectureTree
ExternModuleTemplateDownload
ExternModuleTemplateLecturedetails
ExternModuleTemplateLectures
ExternModuleTemplateNews
ExternModuleTemplatePersBrowse
ExternModuleTemplatePersondetails
ExternModuleTemplatePersons
ExternModuleTemplateSemBrowse
ExternRangeLectureTree
FileLock
FoafDisplay
form
HolidayData
HomepagePlugin
AbstractStudIPHomepagePlugin
HTML_Template_IT
HTML_Template_ITX
HTMLempty
HTML
HTM
HTMpty
IcalExport
Ilias3SaxParser
Ilias3ObjectXMLParser
InstanceStm
IntegrityCheckAbstract
IntegrityCheckArchiv
IntegrityCheckInstitut
IntegrityCheckSeminar
IntegrityCheckStudiengang
IntegrityCheckTermin
IntegrityCheckUser
Interactable
Button
LinkButton
ResetButton
Issue
IssueDB
IT_Error
IT_usage_testcase
ITX_usage_testcase
Iterator
SessionDecoder
IteratorAggregate
Config
Navigation
AdminNavigation
AutoNavigation
StudipPluginNavigation
PluginNavigation
BrowseNavigation
CalendarNavigation
CommunityNavigation
CourseNavigation
FooterNavigation
HelpNavigation
LoginNavigation
MessagingNavigation
ProfileNavigation
SearchNavigation
StartNavigation
StudipNavigation
ToolsNavigation
Request
SimpleORMap
StudipPDOStatement
StudipDebugPDOStatement
Layout
line_diff
LockRules
Log
MediaProxy
Menu
MessageBox
messaging
about
MetaDate
MetaDateDB
Migration
DBMigration
Migrator
MockObjectPerms
Modules
ModulesNotification
AdminModules
Msg
NotificationCenter
ObjectConnections
of_element
of_checkbox
of_file
of_hidden
of_radio
of_reset
of_select
of_submit
of_text
of_textarea
Packager
PageLayout
PDO
StudipPDO
StudipDebugPDO
Perm
Seminar_Perm
Permission
PhpLibUser
PHPUnit_TestCase
IT_api_TestCase
ITX_api_TestCase
IT_Usage_TestCase
PHPUnit_TestListener
Console_TestListener
PluginAdministration
PluginEngine
PluginManager
PluginRepository
PortalPlugin
AbstractStudIPPortalPlugin
ProfileModel
QuickSearch
RangeTreeObject
RangeTreeObjectFak
RangeTreeObjectInst
reiter
ResourceObject
ResourceObjectPerms
ResourcesBrowse
ResourcesOpenObjectGroups
ResourcesUserRoomsList
ResourcesUserRoots
Role
RolePersistence
RoomGroups
RSSFeed
ScheduleView
ScheduleWeek
ScheduleWeekRequests
SemScheduleWeek
SemGroupScheduleDayOfWeek
SchemaVersion
DBSchemaVersion
Score
SearchType
SeminarSearch
SQLSearch
PermissionSearch
StandardSearch
SemBrowse
ExternSemBrowse
ExternSemBrowseTable
ExternSemBrowseTemplate
SemesterData
Seminar
Seminar_User
SeminarCategories
SeminarDB
Session
Seminar_Session
User
ShowObject
ShowSchedules
ShowSchedulesRequests
ShowSemSchedules
ShowGroupSchedules
ShowGroupSchedulesDaily
ShowToolsRequests
ShowTreeRow
ShowList
ShowThread
SingleDate
SingleDateDB
Siteinfo
SiteinfoMarkupEngine
SkipLinks
Smiley
SmileyFavorites
Sql_Query
StartupChecks
Statusgruppe
StmAbstractAssiVisualization
StmBrowse
StmInstanceAssiVisualization
StudienmodulManagementPlugin
Studip_User
Studip_Ws_Service
AccessControlledService
ContentmoduleService
InstituteService
LectureTreeService
SeminarService
SessionService
UserService
Studip_Ws_Struct
Studip_Seminar_Info
StudipAuthAbstract
StudipAuthLdap
StudipAuthLdapHSW
StudipAuthLdapReadAndBind
StudipAuthLdapReader
StudipAuthSSO
StudipAuthCAS
StudipAuthShib
StudipAuthStandard
StudipAuthStandardExtern
StudipAutoloader
StudipCache
StudipFileCache
StudipNullCache
StudipCacheFactory
StudipContentElement
StudipContentElementCalendarevent
StudipContentElementContact
StudipContentElementMessage
StudipContentmoduleHelper
StudIPCore
StudipDebug
StudipForm
StudIPInstitute
StudipInstituteHelper
StudipKing
StudipLectureTreeHelper
StudipLitCatElement
StudipLitClipBoard
StudipLitImportPluginAbstract
StudipLitImportPluginCSV
StudipLitImportPluginEndNote
StudipLitImportPluginGenericXML
StudipLitImportPluginStudipLitList
StudipLitSearch
StudipLitSearchPluginAbstract
StudipLitSearchPluginStudip
StudipLitSearchPluginZ3950Abstract
StudipLitSearchPluginDDB_Experimental
StudipLitSearchPluginFBTechnik
StudipLitSearchPluginGvk
StudipLitSearchPluginFH_Erfurt
StudipLitSearchPluginFH_Jena
StudipLitSearchPluginFH_Nordhausen
StudipLitSearchPluginFH_Schmalkalden
StudipLitSearchPluginFHHIOpac
StudipLitSearchPluginHAAB_Weimar
StudipLitSearchPluginHSfMFL_Weimar
StudipLitSearchPluginIWFdigiClips
StudipLitSearchPluginPhiloFak
StudipLitSearchPluginRkgoe
StudipLitSearchPluginRkhan
StudipLitSearchPluginSUBGoeOpac
StudipLitSearchPluginThULB_Jena
StudipLitSearchPluginTIBUBOpac
StudipLitSearchPluginUB_Erfurt
StudipLitSearchPluginUB_Ilmenau
StudipLitSearchPluginUB_Weimar
StudipLitSearchPluginWisoFak
StudipLitSearchPluginGvkPlus
StudipLitSearchPluginLeopoldina
StudipLitSearchPluginSwb
StudipLitSearchPluginUlb
StudipLitSearchPluginZ3950Abstract_Aleph
StudipLitSearchPluginUB_Trier
StudipMail
StudipModule
CoreAdmin
CoreCalendar
CoreDocuments
CoreElearningInterface
CoreLiterature
CoreOverview
CoreParticipants
CoreResources
CoreSchedule
CoreScm
CoreStudygroupAdmin
CoreStudygroupParticipants
CoreWiki
StandardPlugin
AbstractStudIPStandardPlugin
ForumModule
StudIPPlugin
AbstractStudIPLegacyPlugin
AbstractStudIPAdministrationPlugin
AbstractStudIPCorePlugin
AbstractStudIPHomepagePlugin
AbstractStudIPPortalPlugin
AbstractStudIPStandardPlugin
AbstractStudIPSystemPlugin
StudipSeminarHelper
StudipSemRangeTreeViewSimple
StudipSemSearch
StudipSemSearchHelper
StudipSemTreeSearch
StudipSemTreeViewSimple
ExternSemLectureTree
StudipSessionHelper
StudipSoapClient
Ilias3Soap
Ilias4Soap
StudipStmInstanceTreeViewSimple
StudipStmInstanceUsers
StudipStmSearch
StudipStudyAreaSelection
StudIPTemplateEngine
StudIPUser
StudycourseModel
StudygroupModel
SystemPlugin
AbstractStudIPSystemPlugin
Table
ContainerTable
ContentTable
CSV_Table
ZebraTable
TCPDF
ExportPDF
Template
TextFormat
SmileyFormat
StudipFormat
WikiFormat
StudipTransformFormat
Token
tpl_form
Trails_Controller
LocalizationsController
StudipController
AuthenticatedController
Admin_AutoinsertController
Admin_BannerController
Admin_ConfigurationController
Admin_Cronjobs_LogsController
Admin_Cronjobs_SchedulesController
Admin_Cronjobs_TasksController
Admin_DatafieldsController
Admin_DbIntegrityCheckController
Admin_DomainController
Admin_LockrulesController
Admin_PluginController
Admin_RoleController
Admin_RssFeedsController
Admin_SemClassesController
Admin_SemesterController
Admin_SmileysController
Admin_SpecificationController
Admin_StudycourseController
Admin_UserController
Admin_WebserviceAccessController
Calendar_InstscheduleController
Calendar_ScheduleController
ContentElementController
Course_AvatarController
Course_BasicdataController
Course_BlockAppointmentsController
Course_CancelDatesController
Course_ChangeViewController
Course_ManagementController
Course_PlusController
Course_RoomRequestsController
Course_StudyAreasController
Course_StudygroupController
EventLogController
Institute_AvatarController
JsupdaterController
MeineSeminareController
MessagesController
ProfileController
ProfileModulesController
QuicksearchController
Resources_HelpersController
ScoreController
Settings_SettingsController
Settings_AccountController
Settings_AvatarController
Settings_CalendarController
Settings_CategoriesController
Settings_DeputiesController
Settings_DetailsController
Settings_GeneralController
Settings_MessagingController
Settings_NotificationController
Settings_PasswordController
Settings_PrivacyController
Settings_StatusgruppenController
Settings_StudiesController
Settings_UserdomainsController
SitemapController
SmileysController
StudygroupController
BannerController
iCalController
MediaProxyController
NewsController
SiteinfoController
TermineController
Tree
TreeAbstract
EvaluationTree
ResourcesExternTree
StudipDocumentTree
StudipLitList
StudipRangeTree
StudipSemTree
StudipStmInstancesTree
TreeView
StudipLitListViewAdmin
StudipRangeTreeView
StudipRangeTreeViewAdmin
StudipSemTreeView
StudipSemTreeViewAdmin
UpdateInformation
URLHelper
UserDomain
UserLookup
UserManagement
UserManagementRequestNewPassword
UserModel
VeranstaltungResourcesAssign
WebserviceClient
Soap_WebserviceClient
XML_RPC_WebserviceClient
WebServicePlugin