Collect data from all the functions defined in this module and return list
    of titles parsed from HTML, ``<meta>`` tags and dublin core inlined in
    ``<meta>`` tags.

    Args:
        index_page (str): HTML content of the page you wish to analyze.

    Returns:
        list: List of :class:`.SourceString` objects.

def get_title_tags(index_page):
    """
    Collect data from all the functions defined in this module and return list
    of titles parsed from HTML, ``<meta>`` tags and dublin core inlined in
    ``<meta>`` tags.

    Args:
        index_page (str): HTML content of the page you wish to analyze.

    Returns:
        list: List of :class:`.SourceString` objects.
    """
    dom = dhtmlparser.parseString(index_page)

    titles = [
        get_html_titles(dom),
        get_html_meta_titles(dom),
        get_dublin_core_titles(dom),
    ]

    return sum(titles, [])