def register():
    """
    Return dictionary of tranform factories
    """
    registry = {
        key: bake_html(key)
        for key in ('css', 'css-all', 'tag', 'text')
    }
    registry['xpath'] = bake_parametrized(xpath_selector, select_all=False)
    registry['xpath-all'] = bake_parametrized(xpath_selector, select_all=True)
    return registry