How to access metadata for a term in term.html?

Hi, I’m trying to show custom metadata for a Term, as by doc here and here.

I created _index.md for the term “helsingfors” in this folder:
/content/tags/helsingfors/

with the content

---
title: "Helsingfors"
wikipedia: "https://sv.wikipedia.org/wiki/Helsingfors"
---

I have in terms.html (in /themes/hugo-xmag/layouts/_default/terms.html) added {{.Params.wikipedia}}, like so:

  <ul>
    {{ range $key, $value := .Data.Terms }}
    <li>
      <a href="{{ (print "/" $.Data.Plural "/" $key) | relURL }}">
        {{ $key }}
      </a>
      ({{ len $value }}) {{ .Params.wikipedia }}
    </li>
    {{ end }}
  </ul>

but this leads to an error. What would be the correct way to access the metadata for term? Thank you for help!

Iterate over the page collection instead.

<ul>
  {{ range .Pages }}
    <li><a href="{{ .RelPermalink }}">{{ .LinkTitle }}</a></li>
    ({{ .Params.wikipedia }})
  {{ end }}
</ul>