-sm-6" style="padding:0;">
                <select class="form-control" name="rule-extractor-extraction-has-default">
                    <option value="0" selected="">无默认值</option>
                    <option value="1">有默认值</option>
                </select>
            </div>
            <div class="col-sm-6" style="display:none;" name="rule-extractor-extraction-default">
                <input type="text" class="form-control" placeholder="default value">
            </div>
        </div>
