diff --git a/module/ai/config.php b/module/ai/config.php
index 4d2ec89668..0fb36b61c4 100644
--- a/module/ai/config.php
+++ b/module/ai/config.php
@@ -32,3 +32,8 @@ foreach($config->ai->openai->contentTypeMapping as $contentType => $apis)
 
 $config->ai->createprompt = new stdclass();
 $config->ai->createprompt->requiredFields = 'name';
+
+$config->ai->dataSource = array();
+$config->ai->dataSource['story']['story']         = array('title', 'spec', 'verify', 'product', 'module', 'pri', 'category', 'estimate');
+$config->ai->dataSource['execution']['execution'] = array('name', 'desc', 'estimate');
+$config->ai->dataSource['execution']['tasks']     = array('name', 'pri', 'status', 'estimate', 'consumed', 'left', 'progress', 'estStarted', 'realStarted', 'finishedDate', 'closedReason');
diff --git a/module/ai/control.php b/module/ai/control.php
index bce7337100..1dae1a6a6c 100644
--- a/module/ai/control.php
+++ b/module/ai/control.php
@@ -177,6 +177,16 @@ class ai extends control
      */
     public function promptSelectDataSource($promptID)
     {
+        $prompt = $this->ai->getPromptByID($promptID);
+
+        if($_POST)
+        {
+            // TODO: do stuff.
+        }
+
+        $this->view->activeMenu = 'story';
+        $this->view->dataSource = $this->config->ai->dataSource;
+        $this->view->prompt     = $prompt;
         $this->view->promptID   = $promptID;
         $this->view->title      = $this->lang->ai->prompts->selectDataSource . " {$this->lang->colon} " . $this->lang->ai->prompts->common;
         $this->view->position[] = $this->lang->ai->prompts->common;
diff --git a/module/ai/lang/zh-cn.php b/module/ai/lang/zh-cn.php
index a20dfdda70..be2ba9e093 100644
--- a/module/ai/lang/zh-cn.php
+++ b/module/ai/lang/zh-cn.php
@@ -30,12 +30,14 @@ $lang->ai->prompts->createdDate = '创建时间';
 $lang->ai->prompts->targetForm  = '表单';
 $lang->ai->prompts->funcDesc    = '功能描述';
 
+/* Steps of prompt creation. */
 $lang->ai->prompts->assignRole       = '指定角色';
 $lang->ai->prompts->selectDataSource = '选择对象';
 $lang->ai->prompts->setPurpose       = '确认操作';
 $lang->ai->prompts->setTargetForm    = '结果处理';
 $lang->ai->prompts->finalize         = '准备发布';
 
+/* Role assigning. */
 $lang->ai->prompts->assignModel      = '指定语言模型';
 $lang->ai->prompts->model            = '语言模型';
 $lang->ai->prompts->role             = '角色';
@@ -43,6 +45,46 @@ $lang->ai->prompts->characterization = '角色描述';
 $lang->ai->prompts->rolePlaceholder  = '“你来扮演 <一个什么角色>”';
 $lang->ai->prompts->charPlaceholder  = '该角色的具体描述信息';
 
+/* Data source selecting. */
+$lang->ai->prompts->selectData       = '选择数据';
+$lang->ai->prompts->selectDataTip    = '选择对象后，此处会展示已选对象的数据。';
+$lang->ai->prompts->selectedFormat   = '已选对象为%s，已选 %d 条数据';
+$lang->ai->prompts->nonSelected      = '暂无所选数据。';
+$lang->ai->prompts->sortTip          = '可根据重要性给数据字段排序。';
+
+/* Data source definition. */
+$lang->ai->dataSource = array();
+$lang->ai->dataSource['story']['common']     = '需求';
+$lang->ai->dataSource['execution']['common'] = '执行';
+
+$lang->ai->dataSource['story']['story']['common']   = '需求';
+$lang->ai->dataSource['story']['story']['title']    = '需求标题';
+$lang->ai->dataSource['story']['story']['spec']     = '需求描述';
+$lang->ai->dataSource['story']['story']['verify']   = '验收标准';
+$lang->ai->dataSource['story']['story']['product']  = '产品';
+$lang->ai->dataSource['story']['story']['module']   = '模块';
+$lang->ai->dataSource['story']['story']['pri']      = '优先级';
+$lang->ai->dataSource['story']['story']['category'] = '需求类型';
+$lang->ai->dataSource['story']['story']['estimate'] = '预计工时';
+
+$lang->ai->dataSource['execution']['execution']['common']   = '执行';
+$lang->ai->dataSource['execution']['execution']['name']     = '执行名称';
+$lang->ai->dataSource['execution']['execution']['desc']     = '执行描述';
+$lang->ai->dataSource['execution']['execution']['estimate'] = '预计工时';
+
+$lang->ai->dataSource['execution']['tasks']['common']      = '任务列表';
+$lang->ai->dataSource['execution']['tasks']['name']        = '任务名称';
+$lang->ai->dataSource['execution']['tasks']['pri']         = '优先级';
+$lang->ai->dataSource['execution']['tasks']['status']      = '状态';
+$lang->ai->dataSource['execution']['tasks']['estimate']    = '预计工时';
+$lang->ai->dataSource['execution']['tasks']['consumed']    = '已消耗';
+$lang->ai->dataSource['execution']['tasks']['left']        = '剩余';
+$lang->ai->dataSource['execution']['tasks']['progress']    = '进度';
+$lang->ai->dataSource['execution']['tasks']['estStarted']  = '预计开始';
+$lang->ai->dataSource['execution']['tasks']['realStarted'] = '实际开始';
+$lang->ai->dataSource['execution']['tasks']['finishedDate']= '完成日期';
+$lang->ai->dataSource['execution']['tasks']['closedReason']= '关闭原因';
+
 $lang->ai->prompts->statuses = array();
 $lang->ai->prompts->statuses[''] = '全部';
 $lang->ai->prompts->statuses['draft'] = '草稿';
diff --git a/module/ai/view/promptselectdatasource.html.php b/module/ai/view/promptselectdatasource.html.php
index 35bbf7d518..a06c79ed05 100644
--- a/module/ai/view/promptselectdatasource.html.php
+++ b/module/ai/view/promptselectdatasource.html.php
@@ -10,4 +10,307 @@
  */
 ?>
 <?php include '../../common/view/header.html.php';?>
+
+<?php js::set('dataSource', $dataSource);?>
+<?php js::set('dataSourceLang', $lang->ai->dataSource);?>
+
+<style>
+  .center-wrapper {display: flex; justify-content: center; height: 100%;}
+  .center-content {width: 100%; height: 100%; display: flex; flex-direction: column;}
+  #data-selector {display: flex; flex-direction: row; height: 100%; margin-bottom: 16px;}
+  #data-sources {flex-grow: 2; display: flex; flex-direction: row; margin-right: 16px;}
+  #data-selected {flex-grow: 1; display: flex; flex-direction: column;}
+  .heading > * {display: inline-block; padding: 4px 0;}
+  #data-category-select {flex-grow: 1; background-color: #fafafa; border: 1px solid #eee; border-right: none;}
+  #data-category-select > ul {padding: 16px; margin: 0; list-style: none;}
+  #data-category-select > ul > li > a.active {font-weight: bold;}
+  #data-categories {flex-grow: 1; display: flex; flex-direction: column;}
+  #data-properties {flex-grow: 3; display: flex; flex-direction: column;}
+  #data-properties > .heading {padding: 4px 20px;}
+  #data-properties > .heading > h4 {margin: 6px 0;}
+  #data-property-select {flex-grow: 1; border: 1px solid #eee; border-left: none;}
+  #data-property-selector {height: 100%; width: 100%;}
+  #data-selected-items {flex-grow: 1; border: 1px solid #eee;}
+  .obj-view {display: flex; flex-direction: column; padding: 20px;}
+  .obj-view:not(:first-of-type) {border-top: 1px solid #eee;}
+  .obj-view-body {display: grid; padding: 4px 20px; grid-template-columns: repeat(4, 1fr);}
+  .obj-view-header.checkbox-inline, .obj-view-item.checkbox-inline {margin: 4px; cursor: unset;}
+  .obj-view-item.checkbox-inline+.obj-view-item.checkbox-inline {margin-left: 4px; margin-top: 4px;}
+  .checkbox-inline > label, .checkbox-inline > input {cursor: pointer;}
+</style>
+
+<script>
+/* Store and sync value of datasource input, change by checkbox changes. */
+class DataSourceStore
+{
+  value = {};
+  listeners = [];
+
+  /* Get store value. */
+  get value()
+  {
+    return this.value;
+  }
+
+  /* Set store value. */
+  set value(value)
+  {
+    this.value = value;
+  }
+
+  /* Reset store value. */
+  reset()
+  {
+    this.value = {};
+  }
+
+  /* Sync value from form checkboxes. */
+  sync()
+  {
+    const dataSources = document.querySelectorAll('#data-property-selector');
+    const value = {};
+    dataSources.forEach(dataSource =>
+    {
+      const group = dataSource.getAttribute('object-group');
+      const items = dataSource.querySelectorAll('input[type="checkbox"]');
+      items.forEach(item =>
+      {
+        if(item.checked) value[item.getAttribute('prop')] = true;
+      });
+    });
+    this.value = value;
+    document.querySelector('#datasource').value = JSON.stringify(this.value);
+
+    /* Notify listeners. */
+    this.listeners.forEach(l => (l(this.value)));
+  }
+
+  /* Subscribe for store value changes. */
+  subscribe(listener)
+  {
+    this.listeners.push(listener);
+  }
+
+  /* Unsubscribe for store value changes. */
+  unsubscribe(listener)
+  {
+    this.listeners = this.listeners.filter(l => l !== listener);
+  }
+}
+window.dataSourceStore = new DataSourceStore(); // Create store instance.
+
+/* Data property selector component, declared as custom element. */
+class DataPropertySelector extends HTMLDivElement
+{
+  /* Render with given options. */
+  render(options)
+  {
+    this.innerHTML = '';
+
+    /* Get options. */
+    const {group} = options;
+
+    /* Get data source. */
+    const dataSource     = window.dataSource[group];
+    const dataSourceLang = window.dataSourceLang[group];
+
+    /* Render data source. */
+    for(const [source, props] of Object.entries(dataSource))
+    {
+      const objView = document.createElement('div');
+      objView.classList.add('obj-view');
+
+      const headerItem = new DataPropertyCheckbox();
+      headerItem.classList.add('obj-view-header');
+      headerItem.setAttribute('source', source);
+      headerItem.setAttribute('prop', group);
+      objView.appendChild(headerItem);
+
+      const objViewBody = document.createElement('div');
+      objViewBody.classList.add('obj-view-body');
+      props.forEach(prop =>
+      {
+        const item = new DataPropertyCheckbox();
+        item.classList.add('obj-view-item');
+        item.setAttribute('source', source);
+        item.setAttribute('group', group);
+        item.setAttribute('prop', prop);
+        objViewBody.appendChild(item);
+      });
+      objView.appendChild(objViewBody);
+
+      this.appendChild(objView);
+    }
+  }
+
+  /* Handle attr change, rerender. */
+  attributeChangedCallback(name, oldValue, newValue)
+  {
+    if(name === 'object-group' && oldValue !== newValue) this.render({group: newValue});
+  }
+
+  /* Define observed attr. */
+  static get observedAttributes()
+  {
+    return ['object-group'];
+  }
+}
+customElements.define('data-property-selector', DataPropertySelector, {extends: 'div'});
+
+/*
+ * Checkbox with label for data selection, declared as custom element.
+ *
+ * @prop {string} group  - Data source group name (selected from left sidebar).
+ * @prop {string} source - Data source category (sub-group).
+ * @prop {string} prop   - Data source property name.
+ */
+class DataPropertyCheckbox extends HTMLDivElement
+{
+  /* Render checkbox with label, listen for events. */
+  render()
+  {
+    this.innerHTML = '';
+
+    const prop   = this.getAttribute('prop');
+    const source = this.getAttribute('source');
+    const group  = this.getAttribute('group');
+
+    this.classList.add('checkbox-inline');
+    const itemOption = document.createElement('input');
+    itemOption.setAttribute('type', 'checkbox');
+    itemOption.setAttribute('prop', !!group ? `${source}.${prop}` : source);
+    this.appendChild(itemOption);
+    const itemLabel = document.createElement('label');
+    itemLabel.appendChild(document.createTextNode(!!group ? dataSourceLang[group][source][prop] : dataSourceLang[prop][source].common));
+
+    /* Setup event listeners. */
+    itemLabel.addEventListener('click', (e =>
+    {
+      itemOption.checked = !itemOption.checked;
+      this.handleCheck(itemOption.checked);
+    }).bind(this));
+    itemOption.addEventListener('change', (e =>
+    {
+      this.handleCheck(itemOption.checked);
+    }).bind(this));
+
+    this.appendChild(itemLabel);
+  }
+
+  /* Handle check all for checkbox group, bidirectionally. And push selections into datasource input. */
+  handleCheck(newValue)
+  {
+    if(this.classList.contains('obj-view-header'))
+    {
+      const objViewBody = this.parentElement.querySelector('.obj-view-body');
+      for(const item of objViewBody.querySelectorAll('.obj-view-item input[type="checkbox"]')) item.checked = newValue;
+    }
+    else
+    {
+      const objViewBody = this.parentElement;
+      const headerItem  = objViewBody.parentElement.querySelector('.obj-view-header input[type="checkbox"]');
+      const groupItems  = objViewBody.querySelectorAll('.obj-view-item input[type="checkbox"]');
+      let   allChecked  = true;
+      for(const item of groupItems)
+      {
+        if(!item.checked) allChecked = false;
+      }
+      headerItem.checked = allChecked;
+    }
+    window.dataSourceStore.sync();
+  }
+
+  /* Handle attr change, rerender. */
+  attributeChangedCallback()
+  {
+    /* Skip rendering if props not complete. */
+    if(!this.hasAttribute('prop') || !this.hasAttribute('source')) return;
+    this.render();
+  }
+
+  /* Define observed attr. */
+  static get observedAttributes()
+  {
+    return ['group', 'source', 'prop'];
+  }
+}
+customElements.define('data-property-checkbox', DataPropertyCheckbox, {extends: 'div'});
+</script>
+
+<div id='mainMenu' class='clearfix' style='display: flex; flex-direction: row;'>
+  <?php echo html::backButton("<i class='icon icon-back icon-sm'></i> $lang->goback", '', 'btn btn-info');?>
+  <?php include 'promptdesignprogressbar.html.php';?>
+  <?php echo html::submitButton("<i class='icon icon-save icon-sm'></i> $lang->save", '', 'btn btn-primary');?>
+</div>
+<div id='mainContent' class='main-content' style='height: calc(100vh - 120px);'>
+  <form class='load-indicator main-form form-ajax' method='post' style='height: 100%;'>
+    <div class='center-wrapper'>
+      <div class='center-content'>
+        <div id='data-selector'>
+          <div id='data-sources'>
+            <div id='data-categories'>
+              <div class='heading text-center'>
+                <h4><?php echo $lang->ai->prompts->selectDataSource;?></h4>
+              </div>
+              <div id='data-category-select'>
+                <ul>
+                  <?php foreach(array_keys($dataSource) as $index => $objectGroupKey):?>
+                    <li data-group-key='<?php echo $objectGroupKey;?>'>
+                      <a class='btn btn-block <?php echo $index == 0 ? ' active btn-info' : ' btn-link';?>'>
+                        <?php echo $lang->ai->dataSource[$objectGroupKey]['common'];?>
+                      </a>
+                    </li>
+                  <?php endforeach;?>
+                </ul>
+              </div>
+            </div>
+            <div id='data-properties'>
+              <div class='heading'>
+                <h4><?php echo $lang->ai->prompts->selectData;?></h4>
+                <small class='text-gray'><?php echo $lang->ai->prompts->selectDataTip;?></small>
+              </div>
+              <div id='data-property-select'>
+                <div id='data-property-selector' is='data-property-selector' object-group='story'></div>
+              </div>
+            </div>
+          </div>
+          <div id='data-selected'>
+            <div class='heading'>
+              <h4><?php echo $lang->ai->prompts->selectedFormat;?></h4>
+            </div>
+            <div id='data-selected-items'>
+              <?php echo html::hidden('datasource');?>
+            </div>
+          </div>
+        </div>
+        <div style='display: flex; flex-grow: 1; flex-direction: column-reverse;'>
+          <div style='display: flex; justify-content: center;'><?php echo html::submitButton($lang->ai->nextStep, 'disabled');?></div>
+        </div>
+      </div>
+    </div>
+  </form>
+</div>
+<script>
+$(function()
+{
+  /* Handle category switching. */
+  $('#data-category-select > ul > li > a').click(function()
+  {
+    if($(this).hasClass('active')) return;
+
+    $('#data-category-select > ul > li > a').removeClass('active btn-info').addClass('btn-link');
+    $(this).addClass('active btn-info').removeClass('btn-link');
+    $('#data-property-selector').attr('object-group', $(this).parent().attr('data-group-key'));
+
+    /* Reset selected data. */
+    window.dataSourceStore.reset();
+  });
+
+  /* Disable checkboxes to prevent them getting posted as form data. */
+  $('form').submit(function()
+  {
+    $('#data-property-selector input[type="checkbox"]').each(function() {$(this).attr('disabled', 'disabled');});
+  });
+});
+</script>
 <?php include '../../common/view/footer.html.php';?>