foundryvtt-reve-de-dragon/templates/item-possession-sheet.html

<form class="{{cssClass}}" autocomplete="off">
  {{>"systems/foundryvtt-reve-de-dragon/templates/header-item.html"}}
  {{!-- Sheet Body --}}
  <section class="sheet-body">
      <div class="form-group">
        <label for="system.typepossession">Type de possession</label>
        <input class="attribute-value" type="text" name="system.typepossession" value="{{system.typepossession}}" data-dtype="String"/>
      </div>
      <div class="form-group">
        <label for="system.istrue">Possédé ?</label>
        <input class="attribute-value" type="checkbox" name="system.istrue"  {{#if system.istrue}}checked{{/if}}/>
      </div>
      <div class="form-group">
        <label for="system.compteur">Compteur</label>
        <input class="attribute-value" type="text" name="system.compteur" value="{{system.compteur}}" data-dtype="Number"/>
      </div>
    {{>"systems/foundryvtt-reve-de-dragon/templates/partial-item-description.html"}}
  </section>
</form>