## Block and Text level elements

Most elements that can appear in the document body fall into one of two groups: block level elements which cause paragraph breaks, and text level elements which don't. Common block level elements include `H1` to `H6` (headers), `P` (paragraphs) `LI` (list items), and `HR` (horizontal rules). Common text level elements include `EM`, `I`, `B` and `FONT` (character emphasis), `A` (hypertext links), `IMG` and `APPLET` (embedded objects) and `BR` (line breaks). Note that block elements generally act as containers for text level and other block level elements (excluding headings and address elements), while text level elements can only contain other text level elements. The exact model depends on the element.