Here is a list of all namespaces with brief descriptions:

[detail level 123456]

▼NWikibase
▼NLexeme
▼NDataAccess
▼NChangeOp
▼NValidation
CLemmaTermValidator
CLexemeTermLanguageValidator
CLexemeTermSerializationValidator
CAddFormToLexemeChangeOp
CAddSenseToLexemeChangeOp
CChangeOpFormAdd
CChangeOpFormClone	Copy the properties of the existing Form ($sourceForm) into the passed BlankForm ($entity)
CChangeOpFormEdit	TODO: give me some better name
CChangeOpGloss
CChangeOpGlossList
CChangeOpGrammaticalFeatures
CChangeOpLanguage
CChangeOpLemmaEdit
CChangeOpLemmaRemove
CChangeOpLexicalCategory
CChangeOpRemoveForm
CChangeOpRemoveFormRepresentation
CChangeOpRemoveSense
CChangeOpRemoveSenseGloss
CChangeOpRepresentation
CChangeOpRepresentationList
CChangeOpSenseAdd
CChangeOpSenseClone	Copy the properties of the existing Sense ($sourceSense) into the passed BlankSense ($entity)
CChangeOpSenseEdit	TODO: give me some better name
CChangeOpsFormsEdit	This is missing aggregation of summaries but they never would see light of day due to EditEntity::modifyEntity() & EditEntity::getSummary() anyways
CChangeOpsSensesEdit	This is missing aggregation of summaries but they never would see light of day due to EditEntity::modifyEntity() & EditEntity::getSummary() anyways
▼NStore
CEntityLookupLemmaLookup
CFormRevisionLookup
CFormStore
CFormTitleStoreLookup
CLemmaLookup
CMediaWikiLexemeRedirector
CMediaWikiPageSubEntityMetaDataAccessor	An Accessor for SubEntities that uses the supplied Accessor to look up the Lexeme's MetaData
CNullLabelDescriptionLookup
CSenseRevisionLookup
CSenseStore
CSenseTitleStoreLookup
CLexemeDescription	Class for generating Lexeme description strings
▼NMaintenance
CFixPagePropsSortkey	Maintenance script to fix the pp_sortkey column of the page_props table for pp_propname wb-claims, wbl-forms and wbl-senses
▼NSerialization
CExternalLexemeSerializer	Serializer of Lexeme entities to be used to serializer entities for any external output (i.e
CFormSerializer
CLexemeDeserializer
CSenseDeserializer
CSenseSerializer
CStorageLexemeSerializer
CRegistrar
CWikibaseLexemeHooks	MediaWiki hook handlers for the Wikibase Lexeme extension
CWikibaseLexemeServices
CCreateReservedLexemes	Maintenance script for creating reserved Lexeme entities