public class GUID extends Object implements Serializable
The <guid> element.
From the RSS 2.0 specification...
A string that uniquely identifies the item. More.
<guid> is an optional sub-element of <item>.
guid stands for globally unique identifier. It's a string that uniquely identifies the item. When present, an aggregator may choose to use this string to determine if an item is new.
<guid>http://some.server.com/weblogItem3207</guid>
There are no rules for the syntax of a guid. Aggregators must view them as a string. It's up to the source of the feed to establish the uniqueness of the string.
If the guid element has an attribute named "isPermaLink" with a value of true, the reader may assume that it is a permalink to the item, that is, a url that can be opened in a Web browser, that points to the full item described by the <item> element. An example:
<guid isPermaLink="true">http://inessential.com/2002/09/01.php#a2</guid>
isPermaLink is optional, its default value is true. If its value is false, the guid may not be assumed to be a url, or a url to anything in particular.
public Attribute getIsPermaLink()
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