By using the appropriate div classes and CSS attributes, you can mimic the desired effects of the colspan and rowspan.
Here's the CSS
.table {
display:table;
}
.row {
display:table-row;
}
.cell {
display:table-cell;
padding: 5px;
vertical-align: middle;
}
Here's the sample HTML
<div class="table">
<div class="row">
<div class="cell">
<div class="table">
<div class="row">
<div class="cell">X</div>
<div class="cell">Y</div>
<div class="cell">Z</div>
</div>
<div class="row">
<div class="cell">2</div>
<div class="cell">4</div>
<div class="cell">6</div>
</div>
</div>
</div>
<div class="cell">
<div class="table">
<div class="row">
<div class="cell">
<div class="table">
<div class="row">
<div class="cell">A</div>
</div>
<div class="row">
<div class="cell">B</div>
</div>
</div>
</div>
<div class="cell">
ROW SPAN
</div>
</div>
</div>
</div>
</div>
</div>
From what I'm seeing in both the questions, and most responses, is people seem to forget that in any given div that's acting as a "table-cell" you can insert another div that's acting like an embedded table, and start the process over.
***It's not glamorous, but it does work for those looking for this type of formatting and they want to avoid the TABLEs. If its for DATA LAYOUT, TABLEs do still work in HTML5.
Hopefully, this will help someone.