| Tag | Attributes |
|---|---|
| a | href, name, target, class, title, rel |
| abbr | title |
| b | (none) |
| big | (none) |
| blockquote | class, cite, lang, dir |
| br1 | / |
| c2 | (none) |
| caption | class |
| center | (none) |
| code2 | (none) |
| col | align, col, span, width, class |
| colgroup | align, col, span, width, class |
| dd | (none) |
| del | class, datetime, cite |
| details | open |
| div | class |
| dl | (none) |
| dt | (none) |
| em | (none) |
| font1 | size, color, class |
| h11 | class, align |
| h21 | class, align |
| h3 | class, align |
| h4 | class, align |
| h5 | class, align |
| h6 | class, align |
| hr | / |
| i | (none) |
| ins | class, datetime, cite |
| li | value |
| ol | type, start |
| p | align, class |
| pre1 | class |
| readmore3 | title |
| small | (none) |
| span | class, title |
| spoiler4 | (none) |
| strike | (none) |
| strong | (none) |
| sub | (none) |
| summary | |
| sup | (none) |
| table | width, cellpadding, cellspacing, border, bgcolor, class |
| tbody | width, align, valign, colspan, rowspan, bgcolor, height, class |
| td | width, align, valign, colspan, rowspan, bgcolor, height, class |
| tfoot | width, align, valign, colspan, rowspan, bgcolor, height, class |
| th | width, align, valign, colspan, rowspan, bgcolor, height, class |
| thead | width, align, valign, colspan, rowspan, bgcolor, height, class |
| tr | width, align, valign, colspan, bgcolor, height, class |
| tt | class |
| u | (none) |
| ul | type |
| wbr5 | / |
1These tags are discouraged, for stylistic reasons. And <pre> should be eschewed in favor of <code> (see next).
2<code> and <c>, used for displaying code/data, are not true HTML tags, but are interpreted by the PerlMonks engine. They inhibit the normal interpretation of enclosed HTML special characters like <, >, &, [, and ]. Any newlines in the enclosed code will be rendered such that long lines wrap. Like HTML, <code> and <c> tags are case ignored. Unlike HTML, whitespace is not allowed inside (e.g., < code > will not be recognized), and they must have a matching closing tag (</code> or </c>) for them to work. It is not possible to enclose </code> within a <code> block, nor </c> in a <c> block; they would be taken as block closers instead.
3readmore, used for abbreviating very long posts within the context of other posts, is not a true HTML tag, but is interpreted by the PerlMonks engine. A readmore block is rendered as a <div class="readmore"> block when viewing the node directly, and as a "Read more..." placeholder link otherwise. The link is to a page where you are viewing the node directly, thus displaying the full content. Unlike HTML, whitespace is not allowed inside (e.g., < readmore > will not be recognized). If a matching closing tag (</readmore>) is not given, the readmore block is taken to extend to the end of the body of your post.
4spoiler, used for hiding spoilers, is not a true HTML tag, but is interpreted by the PerlMonks engine. Each reader can choose how spoiler blocks will be rendered.
5The <wbr> HTML element is used to indicate a suggested word-break point for wrapping long strings with no whitespace. See documentation at the W3C.