Guid
data class Guid(var guid: String = UUID.randomUUID().toString(), var isPermalink: Boolean? = null)
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<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>
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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.