RSS <ttl> 元素
完整RSS參考手冊 定義和用法
<ttl> (ttl=time to live)元素指定在feed源更新此feed之前，feed可被緩存的分鐘數
實例
<?xml version="1.0" encoding="ISO-8859-1" ?>
<rss version="2.0">
<channel>
<title>W3Schools Home Page</title>
<link>http://www.w3schools.com</link>
<description>Free web building tutorials</description>
<ttl>60</ttl>
<item>
<title>RSS Tutorial</title>
<link>http://www.w3schools.com/rss</link>
<description>New RSS tutorial on W3Schools</description>
</item>
</channel>
</rss>
<rss version="2.0">
<channel>
<title>W3Schools Home Page</title>
<link>http://www.w3schools.com</link>
<description>Free web building tutorials</description>
<ttl>60</ttl>
<item>
<title>RSS Tutorial</title>
<link>http://www.w3schools.com/rss</link>
<description>New RSS tutorial on W3Schools</description>
</item>
</channel>
</rss>
嘗試一下»
完整RSS參考手冊