EE sample feed; multiple entries if no third segment, otherwise comments from single entry. REQUIRES STASH.

EE RSS Feed (Dynamic)

<?xml version="1.0" encoding="{charset}"?>

<rss version="2.0"
    xmlns:dc="http://purl.org/dc/elements/1.1/"
    xmlns:sy="http://purl.org/rss/1.0/modules/syndication/"
    xmlns:admin="http://webns.net/mvcb/"
    xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
    xmlns:content="http://purl.org/rss/1.0/modules/content/"
    xmlns:atom="http://www.w3.org/2005/Atom"
    xmlns:ee="http://ellislab.com/">

{preload_replace:pre_maintitle="A Title for the Feed"}
{preload_replace:pre_eechannel="channel_name"}
{preload_replace:pre_bodyfield="body"}
{preload_replace:pre_summfield="summary"}
{preload_replace:pre_commentsegment="view"}
{preload_replace:pre_catsegment="category"}
{preload_replace:pre_copyrightnotice="Somebody, All Rights Reserved"}
{preload_replace:pre_copyrightstartyear="2011"}

{exp:channel:info channel="{pre_eechannel}"}
{exp:stash:set name="this_channeldesc"}{channel_description}{/exp:stash:set}
{exp:stash:set name="this_mainurl"}{path='{channel_url}'}/{/exp:stash:set}
{exp:stash:set name="this_commenturl"}{path='{channel_url}{pre_commentsegment}'}/{/exp:stash:set}
{exp:stash:set name="this_categoryurl"}{path='{channel_url}{pre_catsegment}'}/{/exp:stash:set}
{/exp:channel:info}

{exp:rss:feed channel="{pre_eechannel}"}
    <channel>

{exp:channel:entries channel="{pre_eechannel}" limit="10" disable="member_data|pagination"}


  {if count == 1}
    <title>{exp:xml_encode}{pre_maintitle}{if segment_3 != ""} : {title} : Comments{/if}{/exp:xml_encode}</title>
    <link>{if segment_3 != ''}{exp:stash:get name='this_commenturl'}{url_title}{if:else}{exp:stash:get name='this_mainurl'}{/if}</link>
    <description><![CDATA[{if segment_3 != ""}{exp:eehive_hacksaw words="150" append="..."}
        {{pre_summfield}}
    {/exp:eehive_hacksaw}{if:else}{exp:stash:get name='this_channeldesc'}{/if}]]></description>
    <dc:language>{lang}</dc:language>
    <dc:creator>[email protected]</dc:creator>
    <dc:rights>Copyright {gmt_date format="%Y"}</dc:rights>
    <dc:date>{gmt_date format="%Y-%m-%dT%H:%i:%s%Q"}</dc:date>
    <copyright><![CDATA[Copyright {pre_copyrightstartyear}&#0151;{current_time format='%Y'}, {pre_copyrightnotice}]]></copyright>
    <atom:link href="{if segment_3 != ''}{exp:stash:get name='this_commenturl'}{url_title}{if:else}{exp:stash:get name='this_mainurl'}{/if}" rel="self" type="application/rss+xml" />
    <admin:generatorAgent rdf:resource="http://expressionengine.com/" />
    {categories}<category domain="{exp:stash:get name='this_categoryurl'}{category_url_title}"><![CDATA[{category_name}]]></category>{/categories}
  {/if}


{if segment_3 != ""}
{exp:comment:entries}
    <item>
          <title>{exp:xml_encode}{name} commented on {title}{/exp:xml_encode}</title>
          <link>{exp:stash:get name='this_commenturl'}{url_title}#comment-{comment_id}</link>
          <guid isPermaLink="true">{exp:stash:get name='this_commenturl'}{url_title}#comment-{comment_id}</guid>
          <description><![CDATA[{comment}]]></description>
          <dc:date>{gmt_entry_date format="%Y-%m-%dT%H:%i:%s%Q"}</dc:date>
    </item>
{/exp:comment:entries}
{if:else}
    <item>
      <title><![CDATA[{title}]]></title>
      <link>{exp:stash:get name='this_commenturl'}{url_title}</link>
      <guid isPermaLink="true">{exp:stash:get name='this_commenturl'}{url_title}</guid>
      <description><![CDATA[{{pre_bodyfield}}]]></description>
      <dc:subject><![CDATA[{categories backspace="1"}{category_name}, {/categories}]]></dc:subject>
      <dc:date>{gmt_entry_date format="%Y-%m-%dT%H:%i:%s%Q"}</dc:date>
      {categories}<category domain="{exp:stash:get name='this_categoryurl'}{category_url_title}"><![CDATA[{category_name}]]></category>{/categories}
    </item>
{/if}
{/exp:channel:entries}
    
    </channel>
</rss>

{/exp:rss:feed}