
{"tutorial": {"title": "Invisible Markup";
"speaker": "Steven Pemberton"}}
<tutorial title="Invisible Markup"
speaker= "Steven Pemberton"/>
<tutorial>
<title>Invisible Markup</title>
<speaker>Steven Pemberton</speaker>
</title>
or indeed
Tutorial
title: Invisible Markup
speaker: Steven Pemberton
30 April 2023
<date> <day>30</day> <month>April</month> <year>2023</year> </date>

[spec] Steven Pemberton (ed.), Invisible XML Specification,
invisiblexml.org, 2022,
https://invisiblexml.org/ixmlspecification.html
<biblioentry abbrev='spec'>
<editor>
<firstname>Steven</firstname>
<surname>Pemberton</surname>
</editor>
<title>Invisible XML Specification</title>
<publisher>invisiblexml.org</publisher>
<pubdate>2022</pubdate>
<link href='https://invisiblexml.org/ixml-specification.html'/>
</biblioentry>