'Return meta data or config data.'

def _getMeta(self):

    base_url = self.config[u'base_url'][0]
    html_class = self.config[u'html_class'][0]
    if hasattr(self.md, u'Meta'):
        if (u'wiki_base_url' in self.md.Meta):
            base_url = self.md.Meta[u'wiki_base_url'][0]
        if (u'wiki_html_class' in self.md.Meta):
            html_class = self.md.Meta[u'wiki_html_class'][0]
    return (base_url, html_class)
