I have an XML rss feed that looks like this:

<item>
<title>title</title>
<link>link</link>
<description>description</description>
<guid isPermaLink="false">guid</guid>
<pubDate>Tue, 22 Jan 2008 18:34:28 PST</pubDate>
<category>category1</rx:Category>
</item>

<item>
<title>title2</title>
<link>link2</link>
<description>description2</description>
<guid isPermaLink="false">guid2</guid>
<pubDate>Tue, 22 Jan 2008 18:34:28 PST</pubDate>
<category>category1</rx:Category>
</item>

<item>
<title>title3</title>
<link>link3</link>
<description>description3</description>
<guid isPermaLink="false">guid3</guid>
<pubDate>Tue, 22 Jan 2008 18:34:28 PST</pubDate>
<category>category2</rx:Category>
</item>

and so on. Now I have sorted the xml by category, this works great. However now I want to grab the category and use it for a header for all items that belongs to that category, how would I do this with xslt? I mean when there are several items i dont want to "print" the header more than once, and before each first item....

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