Install valid TDE or show validation error

install-valid-tde.xqy

xquery version "1.0-ml";

import module namespace tde = "http://marklogic.com/xdmp/tde" 
        at "/MarkLogic/tde.xqy";

let $template-uri := "/gds_sample_GeoJSON.tde"
let $template := 
  <template xmlns="http://marklogic.com/xdmp/tde">
   <description>Example template for GeoJSON documents</description>
   <context>/envelope[header/type="geojson"]</context>
   <collections>
      <collection>example-geo</collection>
   </collections>
   <templates>
    <template xmlns:tde="http://marklogic.com/xdmp/tde">
      <context>./instance</context>
      <rows>
        <row>
          <schema-name>GDS_Sample</schema-name>
          <view-name>GeoJSON</view-name>
          <view-layout>sparse</view-layout>
          <columns>
            <column>
              <name>OBJECTID</name>
              <scalar-type>long</scalar-type>
              <val>pointId</val>
            </column>
            <column>
              <name>name</name>
              <scalar-type>string</scalar-type>
              <val>name</val>
              <nullable>true</nullable>
            </column>
          </columns>
        </row>
      </rows>
    </template>
   </templates>
</template>

let $valid := tde:validate($template)

return 
  if (map:get($valid, "valid") eq fn:true()) then (
    "Template is valid, Inserting it into the schema database",
    tde:template-insert($template-uri, $template)
  ) else
    $valid