XSLT Processor

A Wordpress plugin by Ten&Two Systems

Atom Feeds

Wikipedia : Atom (web standard)

W3C : Introduction to Atom

XSL file – “case-study-feeds/atom.xsl” 
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:atom="http://www.w3.org/2005/Atom" version="1.0" exclude-result-prefixes="atom">

    <xsl:output method="html" version="1.0" encoding="UTF-8" indent="yes"/>
    <xsl:include href="../../plugins/tenandtwo-xslt-processor/xsl/date.xsl"/>

    <!-- main -->
    <xsl:template match="/">
        <xsl:apply-templates select="atom:feed"/>
    </xsl:template>

    <!-- feed -->
    <xsl:template match="atom:feed">
        <!-- header -->
        <h3><xsl:value-of select="atom:title"/></h3>
        <h5><xsl:value-of select="atom:subtitle"/></h5>

        <!-- body -->
        <xsl:apply-templates select="atom:entry"/>

        <!-- footer -->
        <hr size="1"/>
        <div>
            <xsl:text>Updated : </xsl:text>
            <time>
                <xsl:attribute name="datetime"><xsl:value-of select="atom:updated"/></xsl:attribute>
                <xsl:call-template name="date-format">
                    <xsl:with-param name="value" select="atom:updated"/>
                    <xsl:with-param name="format" select="'Y-m-d h:i A'"/>
                </xsl:call-template>
            </time>

            <xsl:for-each select="atom:author/*">  <!-- name, email, uri -->
                <br/>
                <xsl:text>Author : </xsl:text>
                <xsl:value-of select="text()"/>
            </xsl:for-each>

            <xsl:if test="string-length(atom:link[@rel='alternate']/@href) &gt; 0">
                <br/>
                <a target="_blank">
                    <xsl:attribute name="href"><xsl:value-of select="atom:link[@rel='alternate']/@href"/></xsl:attribute>
                    <xsl:text>Visit Website →</xsl:text>
                </a>
            </xsl:if>
        </div>
    </xsl:template>

    <!-- entry -->
    <xsl:template match="atom:entry">
        <hr size="1"/>
        <h5>
            <time>
                <xsl:attribute name="datetime"><xsl:value-of select="atom:updated"/></xsl:attribute>
                <xsl:call-template name="date-format">
                    <xsl:with-param name="value" select="atom:updated"/>
                    <xsl:with-param name="format" select="'Y-m-d h:i A'"/>
                </xsl:call-template>
            </time>
        </h5>
        <h4>
            <a target="_blank">
                <xsl:attribute name="href">
                    <xsl:choose>
                        <xsl:when test="string-length(atom:link[@rel='alternate']/@href) &gt; 0">
                            <xsl:value-of select="atom:link[@rel='alternate']/@href"/>
                        </xsl:when>
                        <xsl:when test="string-length(atom:link/@href) &gt; 0">
                            <xsl:value-of select="atom:link/@href"/>
                        </xsl:when>
                        <xsl:otherwise><xsl:value-of select="atom:id"/></xsl:otherwise>
                    </xsl:choose>
                </xsl:attribute>
                <xsl:value-of disable-output-escaping="yes" select="atom:title"/>
            </a>
        </h4>
        <div>
            <xsl:choose>
                <xsl:when test="string-length(.//atom:content) &gt; 0">
                    <xsl:value-of disable-output-escaping="yes" select=".//atom:content"/>
                </xsl:when>
                <xsl:otherwise>
                    <xsl:value-of disable-output-escaping="yes" select=".//atom:summary"/>
                </xsl:otherwise>
            </xsl:choose>
        </div>
    </xsl:template>

</xsl:stylesheet><!-- end atom.xsl -->

National Weather Service Alerts for OR

[xslt_transform_xml xsl="case-study-feeds/atom.xsl" xml="https://alerts.weather.gov/cap/or.php?x=0" /]
Output
ERROR : DomDocument->load(xml):
—————————————-
<script type="text/javascript" src="/js/jquery-1.10.2.min.js"></script> <script type="text/javascript" src="/js/jquery-ui-1.10.3.custom.min.js"></script> <script type="text/javascript" src="/js/jquery.hoverIntent.minified.js"></script> <script type="text/javascript" src="/js/ForecastSearch.js"></script> <script type="text/javascript" id="_fed_an_ua_tag" src="https://dap.digitalgov.gov/Universal-Federated-Analytics-Min.js?agency=DOC&sub-agency=NOAA&yt=true&pga4=G-736JJ6NL0V"></script> <script type="text/javascript" src="/js/topNavMenu.js"></script> <script type="text/javascript" src="/js/NidsESRI.js"></script> <script type="text/javascript" src="/js/nwsexit.js"></script>
——————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————-^
Fatal Error 23: EntityRef: expecting ‘;’
Line: 26
Column: 475
—————————————-

—————————————-
<script type="text/javascript" src="/js/jquery-1.10.2.min.js"></script> <script type="text/javascript" src="/js/jquery-ui-1.10.3.custom.min.js"></script> <script type="text/javascript" src="/js/jquery.hoverIntent.minified.js"></script> <script type="text/javascript" src="/js/ForecastSearch.js"></script> <script type="text/javascript" id="_fed_an_ua_tag" src="https://dap.digitalgov.gov/Universal-Federated-Analytics-Min.js?agency=DOC&sub-agency=NOAA&yt=true&pga4=G-736JJ6NL0V"></script> <script type="text/javascript" src="/js/topNavMenu.js"></script> <script type="text/javascript" src="/js/NidsESRI.js"></script> <script type="text/javascript" src="/js/nwsexit.js"></script>
—————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————^
Fatal Error 23: EntityRef: expecting ‘;’
Line: 26
Column: 483
—————————————-

—————————————-
<script type="text/javascript" src="/js/jquery-1.10.2.min.js"></script> <script type="text/javascript" src="/js/jquery-ui-1.10.3.custom.min.js"></script> <script type="text/javascript" src="/js/jquery.hoverIntent.minified.js"></script> <script type="text/javascript" src="/js/ForecastSearch.js"></script> <script type="text/javascript" id="_fed_an_ua_tag" src="https://dap.digitalgov.gov/Universal-Federated-Analytics-Min.js?agency=DOC&sub-agency=NOAA&yt=true&pga4=G-736JJ6NL0V"></script> <script type="text/javascript" src="/js/topNavMenu.js"></script> <script type="text/javascript" src="/js/NidsESRI.js"></script> <script type="text/javascript" src="/js/nwsexit.js"></script>
————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————-^
Fatal Error 23: EntityRef: expecting ‘;’
Line: 26
Column: 493
—————————————-

—————————————-
<div class="icon"><img src="/bundles/templating/images/top_news/important.png"></div>
——————————————————————————————————^
Fatal Error 76: Opening and ending tag mismatch: img line 324 and div
Line: 324
Column: 102
—————————————-

—————————————-
<div class="cms-content"><p>You have reached this page because you tried&nbsp;to reach alerts.weather.gov. As of December 2nd at 10 ET, that website has been decommissioned. Please see Service Change Notice <a href="https://www.weather.gov/media/notification/pdf_2025/scn25-73_update_alerts_webpage_termination_aaa.pdf">25-73</a> for more details. To view alert information via web browser please see weather.gov.</p>
——————————————————————————-^
Error 27: Entity ‘nbsp’ not defined
Line: 427
Column: 79
—————————————-

—————————————-
</body>
————^
Fatal Error 76: Opening and ending tag mismatch: div line 62 and body
Line: 519
Column: 12
—————————————-

—————————————-
</html>
——–^
Fatal Error 76: Opening and ending tag mismatch: body line 33 and html
Line: 520
Column: 8
—————————————-

—————————————-
</html>
——–^
Fatal Error 77: Premature end of data in tag html line 2
Line: 520
Column: 8
—————————————-