Ajax Framework Search Expressions

<div class="card">
    <h:form>
        <p:panel id="panel" header="Search Form" styleClass="mb-3">
            <p:growl id="messages"/>

            <h:panelGrid columns="4" cellpadding="7">
                <h:outputLabel for="txt1" value="Text 1: *"/>
                <p:inputText id="txt1" value="#{searchView.text1}" required="true" label="Text 1" style="width: 12rem">
                    <f:validateLength minimum="2"/>
                </p:inputText>
                <p:message for="txt1"/>
                <h:outputText value="#{searchView.text1}"/>

                <h:outputLabel for="txt2" value="Text 2: *"/>
                <p:selectOneMenu id="txt2" value="#{searchView.text2}" required="true" label="Text 2" style="width: 12rem">
                    <f:selectItem itemLabel="Select One" itemValue="" noSelectionOption="true"/>
                    <f:selectItem itemLabel="Option 1" itemValue="1"/>
                    <f:selectItem itemLabel="Option 2" itemValue="2"/>
                    <f:selectItem itemLabel="Option 3" itemValue="3"/>
                </p:selectOneMenu>
                <p:message for="@previous"/>
                <h:outputText value="#{searchView.text2}"/>
            </h:panelGrid>
        </p:panel>

        <p:commandButton process="@parent:@parent" update="@form" value="Process: @parent:parent (Form)" styleClass="mr-2" />
            <p:commandButton process="@form:@child(1):txt1" update="@form"
                             value="Process: @form:@child(1):txt1 (Text 1)"/>
    </h:form>
</div>