ties" value="{{s}}">
            {{s}}
          </md-option>
        </md-select>
        <md-tooltip md-direction="bottom">Similarity defines the components of scoring. Similarity determines how engine weights terms. FlexSearch interacts with Similarity at both index-time and query-time.</md-tooltip>
      </md-input-container>
    </div>
    <md-input-container>
      <md-switch class="md-primary" ng-model="allowSort">Allow sorting: {{allowSort ? "Yes" : "No"}}</md-switch>
      <md-tooltip md-direction=