tobago-example/tobago-example-demo/src/main/webapp/content/30-concept/08-form/Form.xhtml

<?xml version="1.0" encoding="UTF-8"?>

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<ui:composition template="/main.xhtml"
                xmlns="http://www.w3.org/1999/xhtml"
                xmlns:tc="http://myfaces.apache.org/tobago/component"
                xmlns:ui="http://java.sun.com/jsf/facelets">

  <p>Tobago supports nested forms and can treat each form separately.
    Values can be stored separately into the model, while already filled input elements keep their values (temporarily).
    Forms are added by the <code class="language-markup">&lt;tc:form/></code> tag.</p>
  <p>Forms are also relevant for
    <tc:link label="Default Command"
             outcome="/content/20-component/040-command/10-default/Default_Command.xhtml"/>.</p>
  <tc:link label="Tag Library Documentation" image="#{request.contextPath}/image/feather-leaf.png"
           link="#{apiController.base}/doc/#{apiController.currentRelease}/tld/tc/form.html"/>

  <tc:section label="Example">
    <p>This small example contain two separate forms, each surrounded by a content box.
      The submit button only update the model in the current form.</p>
    <pre><code class="language-markup">&lt;tc:box label="Form 1">
  &lt;tc:form>
    &lt;tc:in label="Value 1" value="\#{formController.value1}"/>
    &lt;tc:out label="Value 1 in Model" value="\#{formController.value1}"/>
    &lt;tc:button label="Submit"/>
  &lt;/tc:form>
&lt;/tc:box>
&lt;tc:box label="Form 2">
  ...
&lt;/tc:box></code></pre>
    <tc:box label="Form 1">
      <tc:form id="form1">
        <tc:in id="in1" label="Value 1" value="#{formController.value1}"/>
        <tc:out id="out1" label="Value 1 in Model" value="#{formController.value1}"/>
        <tc:button id="submit1" label="Submit"/>
      </tc:form>
    </tc:box>
    <tc:box label="Form 2">
      <tc:form id="form2">
        <tc:in id="in2" label="Value 2" value="#{formController.value2}"/>
        <tc:out id="out2" label="Value 2 in Model" value="#{formController.value2}"/>
        <tc:button id="submit2" label="Submit"/>
      </tc:form>
    </tc:box>
  </tc:section>
</ui:composition>