aside tag for .sidebar?

Created by: zrsmith92

As it appears in scaffolding.less, the .sidebar element is only allowed to be a div tag. Is there a specific reason for this? I previously had my sidebar running inside an aside tag. The code in question starts on line 66:

// Fluid layouts (left aligned, with sidebar, min- & max-width content)
div.container-fluid {
  padding: 0 20px;
  .clearfix();
  div.sidebar {
    float: left;
    width: 220px;
  }
  div.content {
    min-width: 700px;
    max-width: 1180px;
    margin-left: 240px;
  }
}