def new_sharedStrings_text(db):
    """
    Returns xl/sharedStrings.xml text

    :param pylightxl.Database db: database contains sheetnames, and their data
    :return str: xl/sharedStrings.xml text
    """
    xml_base = (
        '<?xml version="1.0" encoding="UTF-8" standalone="yes"?>\r\n<sst uniqueCount="{sharedString_len}" count="{sharedString_len}" xmlns="http://schemas.openxmlformats.org/spreadsheetml/2006/main">\r\n{many_tag_si}\r\n</sst>'
        )
    xml_tag_si = '<si><t {space_preserve}>{val}</t></si>\r\n'
    sharedString_len = len(db._sharedStrings)
    many_tag_si = ''
    for val in db._sharedStrings:
        if val[0] == ' ' or val[-1] == ' ':
            space_preserve = 'xml:space="preserve"'
        else:
            space_preserve = ''
        many_tag_si += xml_tag_si.format(space_preserve=space_preserve, val=val
            )
    rv = xml_base.format(sharedString_len=sharedString_len, many_tag_si=
        many_tag_si)
    return rv
