A basic guide, including proper usage. The focus is on elements that can't be marked up using the WP editor.

Header Examples

The main page header of this guide is an h1 element. Please reserve h1 for individual page titles only. The header above is an h2.

Third-Level Header

The header above is an h3 element, which may be used for any form of page-level header which falls below the h2 header in a document hierarchy. More than one may be used per page.

Fourth-Level Header

The header above is an h4 element, which may be used for any form of page-level header which falls below the h3 header in a document hierarchy. More than one may be used per page.

Quotes

Use blockquote for quotes. Here’s an example of correct usage:
Many forms of Government have been tried and will be tried in this world of sin and woe. No one pretends that democracy is perfect or all-wise. Indeed, it has been said that democracy is the worst form of government except all those other forms that have been tried from time to time.

Definition Lists

This is a term.
This is the definition of that term, which both live in a dl.
Here is another term.
And it gets a definition too, which is this line.
Here is term that shares a definition with the term below.
Here is a defined term.
dt terms may stand on their own without an accompanying dd, but in that case they share descriptions with the next available dt. You may not have a dd without a parent dt.

Tables

Tables should be used when displaying tabular data. The thead, tfoot and tbody elements enable you to group rows within each a table. If you use these elements, you must use every element. They should appear in this order: thead, tfoot and tbody, so that browsers can render the foot before receiving all the data. You must use these tags within the table element.
Ingredients Serves 12 Serves 24
Milk 1 quart 2 quart
Cinnamon Sticks 2 1
Vanilla Bean, Split 1 2
Cloves 5 10
Mace 10 blades 20 blades
Egg Yolks 12 24
Cups Sugar 1 ½ cups 3 cups
Dark Rum 1 ½ cups 3 cups
Brandy 1 ½ cups 3 cups
Vanilla 1 tbsp 2 tbsp
Half-and-half or Light Cream 1 quart 2 quart
Freshly grated nutmeg to taste