VOEFG Utility Specs:
  o Python 3.5
      + initially developed with Python 2.7, but no longer tested
  o Dependencies
    # System modules
      + collections.OrderedDict
      + os
      + shutil
      + sys
      + tempfile
      + urllib.request.urlopen
      + urllib2 
         NOTE: The urllib2 module has been split across several modules in 
               Python 3 named urllib.request and urllib.error. The 2to3 tool 
               will automatically adapt imports when converting your sources 
               to Python 3.
      + xml.dom.minidom
    # CIAO modules
      + paramio
      + pycrates as cr
      + stk

  o General Design
      Basic design is a template driven utility to annotate existing data 
      products to IVOA data models.
      + Template driven
          user defines structure and content as a template using vo-dml tags 
          to identify object/type instances.
      + Values may be extracted from a source file or specified directly
      + Supports output serializations in 
        * VOTable-1.3 standard syntax
            Validates using votlint
        * VOTable-1.3 annotated with VO-DML/Mapping syntax
            Validates with xmllint to VOTable-1.4 schema 
            (proposed update to 1.3 with imported VO-DML mapping syntax schema)
        * An internal DOC format
            XML/DOM structure representing the instances generated when 
            interpreting the template