Here is a list of all struct and union fields with links to the structures/unions they belong to:

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• OBJECT_ID : ilObject2GUI
• OBJECT_OWNER : ilRemoteObjectBase
• ObjectIdExists() : ilObjectFactory
• objectsObject() : ilObjPaymentSettingsGUI
• observeNoteAction() : ilBlogPostingGUI , ilWikiPageGUI
• OFFLINE_QUERY : ilLuceneAdvancedSearchFields
• offlineexport() : ilLMPresentationGUI
• offlineexportform() : ilLMPresentationGUI , ilObjDlBookGUI
• offlineMode() : ilGlossaryPresentationGUI , ilLMPresentationGUI , ilTableOfContentsExplorer , ilLMTOCExplorer
• offsetExists() : Slim_Session_Flash
• offsetGet() : HTMLPurifier_StringHash , Slim_Session_Flash
• offsetSet() : Slim_Session_Flash
• offsetUnset() : Slim_Session_Flash
• OggPageSegmentLength() : getid3_ogg
• OLE() : OLE
• OLE2LocalDate() : OLE
• OLE_PPS() : OLE_PPS
• OLE_PPS_File() : OLE_PPS_File
• OLE_PPS_Root() : OLE_PPS_Root
• omitLocator() : ilObject2GUI , ilObjectGUI
• ON_ITEM_CLICK_FORM_SELECT : ilAdvancedSelectionListGUI
• ON_ITEM_CLICK_FORM_SUBMIT : ilAdvancedSelectionListGUI
• ON_ITEM_CLICK_HREF : ilAdvancedSelectionListGUI
• ON_ITEM_CLICK_NOP : ilAdvancedSelectionListGUI
• onCopy() : assQuestion
• onDuplicate() : assQuestion
• ONE_OPEN_SESSION : ilAccordionGUI
• onInvalidInfo() : Spreadsheet_Excel_Writer_Validator
• onInvalidStop() : Spreadsheet_Excel_Writer_Validator
• onInvalidWarn() : Spreadsheet_Excel_Writer_Validator
• ONLINE_QUERY : ilLuceneAdvancedSearchFields
• open() : ilSessionDBHandler , ilLog , Auth_RADIUS , Auth_RADIUS_PAP , Auth_RADIUS_Acct , Log_composite , Log_console , Log_daemon , Log_display , Log_error_log , Log_file , Log_firebug , Log_mail , Log_mcal , Log_mdb2 , Log_null , Log_sql , Log_sqlite , Log_syslog , Log_win , Log , ilCSVReader , Slim_Session_Handler_Cookies , Slim_Session_Handler
• openClipboard() : ilObjMediaPoolGUI
• openDatabase() : Securimage
• openFile() : ilDBGenerator
• openid_associate() : Auth_OpenID_Server
• openid_check_authentication() : Auth_OpenID_Server
• openList() : Parser
• openLog() : ilSCORM13Player
• openSocket() : ilPurchasePaypal
• openTag() : Auth_OpenID_Parse
• openXMLFile() : ilQTIParser , ilSaxParser
• OPERATOR_AND : ilSearchSettings
• OPERATOR_OR : ilSearchSettings
• OptimFROGbitsPerSampleTypeLookup() : getid3_optimfrog
• OptimFROGchannelConfigNumChannelsLookup() : getid3_optimfrog
• OptimFROGchannelConfigurationLookup() : getid3_optimfrog
• OptimFROGcompressionLookup() : getid3_optimfrog
• OptimFROGencoderNameLookup() : getid3_optimfrog
• OptimFROGsampleTypeLookup() : getid3_optimfrog
• OptimFROGspeedupLookup() : getid3_optimfrog
• optimizeData() : ilObjLanguage
• optimizeStartingTime() : ilCalendarRecurrenceCalculator
• optimizeTable() : ilDB , ilDBMySQL
• optimizeTables() : ilDBUpdate
• options() : Slim
• Options() : Parser
• ORDER_CREATION_DATE_ASC : ilObjMediaCast
• ORDER_CREATION_DATE_DESC : ilObjMediaCast
• ORDER_DEFAULT : ilContainerSorting
• ORDER_MANUAL : ilObjMediaCast
• ORDER_MODE_ALPHA : ilAssQuestionTypeOrderer
• ORDER_MODE_FIX : ilAssQuestionTypeOrderer
• ORDER_TITLE : ilObjMediaCast
• orderAssByDeadline() : ilExAssignment
• orderAssignmentsByDeadlineObject() : ilObjExerciseGUI
• orderHintIndexes() : ilAssQuestionHintsGUI
• orderPDItemsByLocation() : ilPDSelectedItemsBlockGUI
• orderPDItemsByType() : ilPDSelectedItemsBlockGUI
• ORg_updatePrice() : ilPaymentObjectGUI
• Organization() : ilMimeMail
• orig() : Diff , WordLevelDiff
• originalSyncForm() : assQuestionGUI , SurveyQuestionGUI
• orphanedPagesObject() : ilObjWikiGUI
• out() : ilObjLanguageFolderGUI
• outAdditionalOutput() : assTextQuestionGUI , assQuestionGUI
• outCertificate() : ilTestEvaluationGUI , ilCertificate
• outCertificateObject() : ilObjExerciseGUI
• outCertificateWithGivenContentAndVariables() : ilCertificate
• outChapterSelector() : assQuestionGUI
• outChart() : SurveyQuestion
• outCorrectSolution() : ilTestOutputGUI , ilTestEvaluationGUI
• outErrorMessages() : SurveyQuestionGUI
• outEvaluation() : ilTestEvaluationGUI
• outEvaluationObject() : ilObjTestGUI
• outGlossarySelector() : assQuestionGUI
• outIntroductionPage() : ilTestOutputGUI
• outNavigationButtons() : ilSurveyExecutionGUI
• outObligationsOnlySummary() : ilTestOutputGUI
• outPageSelector() : assQuestionGUI
• outParticipantsPassDetails() : ilTestEvaluationGUI
• outParticipantsResultsOverview() : ilTestEvaluationGUI
• outPreconditionSelectValue() : SurveyMetricQuestion
• outProcessingTime() : ilTestOutputGUI
• output() : ilGlossaryTermGUI , Securimage
• Output_css() : Output_css
• Output_HTML() : Output_HTML
• Output_xml() : Output_xml
• outputApplet() : ilLMStatistics
• outputAudioFile() : Securimage
• outputFormHtmlBlock() : ilHtmlBlockGUIGen
• outputHTML() : ilLMStatistics
• outputIcons() : ilExplorer
• outputInfoScreen() : ilLMPresentationGUI , ilSAHSPresentationGUI , ilGlossaryPresentationGUI , ilObjFileBasedLMGUI
• outputMapWorkCopy() : ilMediaItem
• outputPostProcessing() : ilImageMapEditorGUI , ilPCIIMTriggerEditorGUI
• outputStatistics() : ilLMStatisticsGUI
• outputSuffixes() : ilFileInputGUI
• outputTagStyleEditScreen() : ilObjStyleSheetGUI
• outputThumbnail() : ilInternalLinkGUI
• outputToTemplate() : ilPageObjectGUI
• OutputType() : Parser
• outQuestionForTest() : assOrderingHorizontalGUI , assSingleChoiceGUI , assNumericGUI , assMatchingQuestionGUI , assClozeTestGUI , assJavaAppletGUI , assMultipleChoiceGUI , assFlashQuestionGUI , assImagemapQuestionGUI , assOrderingQuestionGUI , assTextSubsetGUI , assErrorTextGUI , assTextQuestionGUI , assFileUploadGUI
• outQuestionPage() : assQuestionGUI
• outQuestionSummary() : ilTestOutputGUI
• outQuestionSummaryWithObligationsInfo() : ilTestOutputGUI
• outQuestionText() : SurveyQuestionGUI
• outQuestionType() : assQuestionGUI
• outResultsToplist() : ilTestOutputGUI
• outSolutionExplorer() : assQuestionGUI
• outSurveyPage() : ilSurveyExecutionGUI
• outTestPage() : ilTestOutputGUI
• outUserListOfAnswerPasses() : ilTestEvaluationGUI , ilTestOutputGUI
• outUserPassDetails() : ilTestEvaluationGUI
• outUserResultsOverview() : ilTestOutputGUI , ilTestEvaluationGUI
• outWorkingForm() : ilTestOutputGUI
• overview() : ilDidacticTemplateSettingsGUI , ilECSSettingsGUI
• OWNER : ilSoapGroupAdministration , ilSoapCourseAdministration
• owner() : ilObjContentObjectGUI , ilPermission2GUI , ilObjSAHSLearningModuleGUI
• owner_document() : php4DOMNode , php4DOMElement
• OWNER_KEY : ilCopyWizardOptions