You can create any arbitrary tag for an element and it will be treated like a span until you define its appearance with CSS.

    Features {
      display: block;
      padding-left: 1.5em;
      list-style-type: disc;
    }

    Feature {
      display: list-item;
    }

Technically, you're supposed to add a dash to a custom element to avoid namespace issues with potentially new elements, but that's probably an easy search and replace if it ever happens.

This comes in very handy with XML.