Question:

By default, every XPage contains a tag in the rendered HTML markup.
How can I create an XPage without default form tags inside?
Also, can I manually create my own form tags in an XPage?

Answer:

When creating an XPage, Domino Designer automatically insert a form into the XPage.
This is because a JSF page needs a form tag to be able to POST requests to the server.
You can override the automatic creation of the form by setting the property createForm to false (as shown below)
To manually insert a form, use the xp:form tag in the source editor of the XPage.

• If createForm is empty/not specified (the default), a default form will be created if none had been created manually.
• If createForm is set to FALSE, no automatic form will be created.
• If createForm is set to TRUE it will force the creation of the form, even though another one might already exist.
  This can be useful in a custom control, where the HTML of the custom control is moved outside the main form.
  (For example, this is what Dojo is doing for inner dialogs (the div is moved as a child of the body, thus out of the form generated by the page)