You can use most HTML tags in TWiki topics without a problem. This is useful where you want to
add some content that is formatted in a way that is not supported using TWiki shorthand, for example,
you can write <strike>deleted text</strike>
to get deleted text.
There are a few usability and technical considerations to keep in mind:
<literal>..</literal>
tags around blocks of HTML to avoid accidental interpretation of TWiki shorthand within the HTML.
Recommendations when pasting HTML from other sources (using the plain-text editor):
<body>
and </body>
tags.
<p />
paragraph tags on empty lines, which causes problems if done between HTML tags that do not allow paragraph tags, like for example between table tags.
<...>
- of a HTML tag are on the same line, or the tag will be broken.
When using a WYSIWYG editor, you can just copy-paste directly into the editor, and the content will be converted to TWiki shorthand automatically when you save.