Web App. Add SAPUI5 elements to a view

<mvc:View controllerName="macara.webapp.controller.App"

       displayBlock="true"

       xmlns="sap.m"

       xmlns:mvc="sap.ui.core.mvc"

       xmlns:core="sap.ui.core">

    <Page title="{i18n>title}">

      <content>

         <Label text="XXX" labelFor="city"/>

         <Button text="Find 

                 "class="sapUiSmallMarginTop" 

                  type="Emphasized"/>

              </content>

         

     </Page>