    >>> from owslib import crs
    >>> c=crs.Crs('EPSG:4326')
    >>> c.code
    4326
    >>> c.getcodeurn()
    'urn:ogc:def:crs:EPSG::4326'
    >>> c.getcodeuri1()
    'http://www.opengis.net/def/crs/EPSG/0/4326'
    >>> c.getcodeuri2()
    'http://www.opengis.net/gml/srs/epsg.xml#4326'
    >>> c=crs.Crs('urn:ogc:def:crs:EPSG::4326')
    >>> c.authority
    'EPSG'
    >>> c.axisorder
    'yx'
    >>> c=crs.Crs('http://www.opengis.net/gml/epsg.xml#4326')
    >>> c.code
    4326
    >>> c.axisorder
    'yx'
    >>> c=crs.Crs('urn:x-ogc:def:crs:EPSG:6.11:2192')
    >>> c.axisorder
    'xy'
    >>> c.code
    2192
    >>> c.version
    '6.11'
    >>> c=crs.Crs('http://www.opengis.net/def/crs/EPSG/0/4326')
    >>> c.authority
    'EPSG'
    >>> c.code
    4326
    >>> c.axisorder
    'yx'
    >>> c=crs.Crs('PROJ4:+proj=lcc +lat_1=46.8 +lat_0=46.8 +lon_0=0 +k_0=0.99987742 +x_0=600000 +y_0=2200000')
    >>> c.authority
    'PROJ4'
    >>> c.code
    '+proj=lcc +lat_1=46.8 +lat_0=46.8 +lon_0=0 +k_0=0.99987742 +x_0=600000 +y_0=2200000'
