Here is a list of all namespaces with brief descriptions:

[detail level 12345]

o2o_db_cfgmap
o2o_db_gain
o2o_db_manager
o2o_helper
o2olib
o2oRun
o2oRun_SiStripDAQ
o2oRun_SiStripDCS
objectEnergyScale_cfi
objects
all
autophobj
IsoTrackAnalyzer
JetAnalyzer
LeptonAnalyzer
METAnalyzer
PhotonAnalyzer
TauAnalyzer
VertexAnalyzer
objectSelection_cff
objectSpatialResolution_cfi
ObjMonitor_cfi
OccupancyClient_cfi
occupancyplots_cfi
occupancyplotsselections_bpixladders_cff
occupancyplotsselections_cff
occupancyplotsselections_phase2_cff
occupancyplotsselections_pixelphase1_cff
occupancyplotsselections_pixelphase1_detailed_cff
occupancyplotsselections_simplified_cff
OccupancyTask_cfi
officialStyle
officialUncalib2006Production_0_4_0_cfg
OfflineClient_cff
OfflineClient_cfg
OfflineDbClient_cff
OfflineDbClient_cfg
OfflineDbClientMP_cfg
OfflineDQM_cff
OfflineHarvestingSequence_cosmic
OfflineHarvestingSequence_hi
OfflineHarvestingSequence_pp
OfflineHarvestSequence_cosmic
OfflineHarvestSequence_hi
OfflineHarvestSequence_pp
OfflineMessageLogger_cff
OfflineOutput_cfi
OfflinePixel3DPrimaryVertices_cfi
OfflinePrimaryVertices_cfi
OfflinePrimaryVerticesFromCosmicTracks_cfi
OfflinePrimaryVerticesWithBS_cfi
OfflineSiStripConfigDb_cff
offlineSlimmedPrimaryVertices4D_cfi
offlineSlimmedPrimaryVertices_cfi
offlineSlimmedPrimaryVerticesWithBS_cfi
OfflineSource_cfi
OfflineSourceSequence_cosmic
OfflineSourceSequence_hi
OfflineSourceSequence_pp
offlineValidation
offlineValidationTemplates
offsetAnalyzerDQM_cff
omt
omtf
DataWord64
omtfStage2Digis_cfi
omtfStage2Raw_cfi
OnDemandMonitoring_cfi
one
onia2MuMuPAT_cfi
OniaAddV0TracksProducer_cfi
oniaPATMuonsWithTrigger_cff
OniaPhotonConversionProducer_cfi
online
online_customizations_cfi
onlinebeammonitor
onlinebeammonitor_dqm_sourceclient-live_cfg
OnlineDQM_cff
OnlineMessageLogger_cff
OnlineMetaData_EventContent_cff
OnlineOutput_cfi
OnlineSiStripConfigDb_cff
OnlineSource_cfi
ootPhotonCore_cff
ootPhotonMatch_cff
ootPhotonProducer_cff
ootPhotons_cff
ootPhotonSelector_cff
ootPhotonSequence_cff
OppositeAnalyticalPropagator_cfi
OppositeMaterialPropagator_cfi
OpticalFunctionsConfig_cfi
options
Options
optionsL1T
optutl
oracle
occi
OrderedSet
OuterTrackerClientConfig_cff
OuterTrackerMonitorTrackingParticles_cfi
OuterTrackerMonitorTTCluster_cfi
OuterTrackerMonitorTTStub_cfi
OuterTrackerMonitorTTTrack_cfi
OuterTrackerSourceConfig_cff
OuterTrackerSourceConfigV_cff
outInSeedsFromStandaloneMuons_cfi
outputCommands_cfi
outputmodule
outZeeAlca_cff
overlapproblemtpanalyzer_cfi
overlapproblemtsosanalyzer_cfi
OverlapTagger_cff
overlapValidation
overlapValidationPlot
overlapValidationTemplates