def convert_html_tags_to_jats(xml_etree):
    """
        This methods receives an etree node and replace all "html tags" to
        jats compliant tags.
    """

    tags = (
        ('strong', 'bold'),
        ('i', 'italic'),
        ('u', 'underline'),
        ('small', 'sc')
    )

    for from_tag, to_tag in tags:
        for element in xml_etree.findall('.//'+from_tag):
            element.tag = to_tag

    return xml_etree