Given this source:
<Playlist>
<Song order="5" id="c95">
<Title>Maneater</Title>
<Artist>Hall and Oates</Artist>
<Album>H20</Album>
<Year>1982</Year>
</Song>
<Song order="13" id="c49">
<Title>Strangers In The Night</Title>
<Artist>Frank Sinatra</Artist>
<Album>Reprise Collection Boxed Set</Album>
<Year>1966</Year>
</Song>
<Song order="8" id="c22">
<Title>Strangers In The Night</Title>
<Artist>Frank Sinatra</Artist>
<Album>Your Hit Parade - '60s Instrumentals</Album>
<Year>1960</Year>
</Song>
</Playlist>
And given the following templates from my stylesheet:
<xsl:template match="Playlist">
<h1>Songs By Decade</h1>
<xsl:for-each-group select="Song" group-by="substring(Year, 1, 3)">
<p>Decade: <xsl:value-of select="current-grouping-key()"/>0's</p>
<p style="margin-left: 1pc;">
<xsl:apply-templates select="current-group()/Title" />
</p>
</xsl:for-each-group>
</xsl:template>
<xsl:template match="Title">
<xsl:apply-templates select="." /><br/>
</xsl:template>
How do I filter the current group so that the same song doesn't occur
more than once for a decade (that is, so I don't get "Strangers In the
Night" more than once for the 60's)?
Thanks,
Don
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