Imports

    >>> from __future__ import (absolute_import, division, print_function)
    >>> from owslib.etree import etree
    >>> from owslib.iso import MD_Metadata, MD_DataIdentification, CI_ResponsibleParty, MD_ReferenceSystem

Print testing of various ISO fields

    >>> md = MD_Metadata()
	>>> md.identification = MD_DataIdentification()
	>>> val = CI_ResponsibleParty()
	>>> val.organization = 'NTUA'
	>>> val.email = 'gcpp.kalxas@gmail.com'
	>>> val.role = 'pointOfContact'
	>>> md.contact.append(val)
	>>> md.datestamp = '2014-05-20'
	>>> md.identification.title = 'Title'
	>>> md.identification.abstract = 'Abstract'
	>>> md.identification.identtype = 'dataset'
	>>> md.identifier = '286c0725-146e-4533-b1bf-d6e367f6c342'
	>>> md.identification.topiccategory.append('biota')
	>>> md.identification.topiccategory.append('environment')
	>>> md.referencesystem = MD_ReferenceSystem()
	>>> md.referencesystem.code = '4326'
	>>> md.referencesystem.codeSpace = 'urn:ogc:def:crs:EPSG'
	>>> md.referencesystem.version = '6.11.2'
	>>> kw = {}
	>>> kw['keywords'] = []
	>>> kw['keywords'].append('Agricultural and aquaculture facilities')
	>>> kw['keywords'].append('Bio-geographical regions')
	>>> kw['type'] = None
	>>> kw['thesaurus'] = {}
	>>> kw['thesaurus']['date'] = '2008-06-01'
	>>> kw['thesaurus']['datetype'] = 'publication'
	>>> kw['thesaurus']['title'] = 'GEMET - INSPIRE themes, version 1.0'
	>>> md.identification.keywords.append(kw)

	>>> md.identifier
	'286c0725-146e-4533-b1bf-d6e367f6c342'
	>>> kw == {'keywords': ['Agricultural and aquaculture facilities', 'Bio-geographical regions'], 'type': None, 'thesaurus': {'date': '2008-06-01', 'datetype': 'publication', 'title': 'GEMET - INSPIRE themes, version 1.0'}}
	True
    >>> md.languagecode is None
    True
