Please make sure you have read the Tag Syntax document and understand how tag attribute syntax works.
{% remote_file_content https://raw.githubusercontent.com/apache/struts/master/core/src/site/resources/tags/form-description.html %}
The remote form allows the form to be submitted without the page being refreshed. The results from the form can be inserted into any HTML element on the page.
NOTE: The order / logic in determining the posting url of the generated HTML form is as follows:
{% remote_file_content https://raw.githubusercontent.com/apache/struts/master/core/src/site/resources/tags/form-attributes.html %}
<s:form ... />
There are two flavours Client Side Validation, depending on the theme you are using (xhtml, ajax, etc). If you are using the xhtml theme or css_xhtml theme, pure client side validation will be used. Read the Client Side Validation docs for more information.