   exports.extract = extract
   exports.Description = Description
   exports.State = State
-  exports.Mapper = Mapper
+  exports.Context = Context
   exports.ElementData = ElementData
   exports.contexts = contexts
 

  class State
    constructor: (@base, @profile, resolveURI) ->
      @resolveURI = resolveURI
      @mapper = new Mapper(null, contexts[@profile])
      @lang = null

      @lists = {}

  # attributes of an element. Use this to produce triples.
  class Description
    constructor: (el, parentState) ->
      data = new ElementData(el, parentState)
      @usesVocab = data.getVocab()
      @state = data.state
      #@context = data.context
      @about = data.getAbout()
      @resource = data.getResource()
      @types = data.getTypes()
