def check_rel_attribute(link):
    """Check rel attribute of link"""

    rel = link.get('rel')

    if rel is not None:
        if 'nofollow' in rel:
            return False
        elif 'bookmark' in rel:
            return False
        elif 'alternate' in rel:
            return False
        elif 'license' in rel:
            return False
        elif 'search' in rel:
            return False

    return True