[1] Guide to the W3C XML Specification (XMLspec) DTD, Version 2.1, 2014-02-24T23:47:01.000Z, 2024-08-24T02:21:15.767Z https://www.w3.org/XML/1998/06/xmlspec-report.htm#bibl

[2] Guide to the W3C XML Specification (XMLspec) DTD, Version 2.1, 2014-02-24T23:47:01.000Z, 2024-08-24T02:41:18.685Z https://www.w3.org/XML/1998/06/xmlspec-report.htm#bibref

[3] Guide to the W3C XML Specification (XMLspec) DTD, Version 2.1, 2014-02-24T23:47:01.000Z, 2024-08-24T02:43:31.620Z https://www.w3.org/XML/1998/06/xmlspec-report.htm#AEN2622