Hello all!
Let's see if anybody can help me with this.
My input XML file is of the form:
input.xml
---------
<scl1001>
...
<reg date="2003-11-04">
<user dept="2" lastacc="2003-11-04 09:13:10.003276">john</user>
<user dept="2" lastacc="2003-11-04 09:09:23.043209">tom</user>
<user dept="1" lastacc="2003-11-04 21:31:25.748652">JAMES</user>
</reg>
...
<reg date="2003-11-07">
<user dept="1" lastacc="2003-11-07 14:33:33.735231">rob</user>
<user dept="2" lastacc="2003-11-07 18:58:50.221562">julia</user>
<user dept="1" lastacc="2003-11-07 22:23:57.772418">JAMES</user>
</reg>
<reg date="2003-11-10">
<user dept="2" lastacc="2003-11-10 10:50:40.438368">tom</usw>
</reg>
...
</scl1001>
The files contains the timestamp of the last login of users on each
day. Each user may log in several times during a day, and may log
in several days. The different <user>'s within each <reg> may not be
ordered. The file contains information of the current year.
I'd like to transform that XML file into another of the following
form:
output.xml
----------
<scl1001>
...
<user dept="1" lastacc="2003-11-07 22:23:57.772418">JAMES</user>
<user dept="2" lastacc="2003-11-10 10:50:40.438368">tom</usw>
...
</scl1001>
Given a year and month (say Nov 2003), output.xml contains the
list of <user> tags, with the most recent login timestamp, thus
each <user> appears just once.
The XSL sheet I'm working on does not exactly generate the
required output, it repeats <user>'s. The problem is in the
first <for-each>.
I don't know how to select distinct <user> tags, that is,
distinct user names (avoid duplicates).
Any hint would be highly appreciated.
Thanks!
Sample output.xml:
------------------
<scl1001>
...
<user dept="2" lastacc="2003-11-10 10:50:40.438368">tom</user>
<user dept="2" lastacc="2003-11-10 10:50:40.438368">tom</user>
...
</scl1001>
This is the XSL file:
month_activity.xsl:
-------------------
(Note: "theDate" is a parameter of the form yyyy-mm)
<xsl:key name="group-by-name" match="user" use="."/>
<xsl:template match="scl1001">
<scl1001>
<xsl:for-each select=".//user[substring(@lastacc,1,7)=$theDate]">
<xsl:sort select="." data-type="text" order="ascending"/>
<xsl:for-each
select="key('group-by-name',.)[substring(@lastacc,1,7)=$theDate]">
<xsl:sort select="@lastacc" data-type="text"
order="descending"/>
<xsl:if test="position() = 1"><xsl:copy-of
select="."/></xsl:if>
</xsl:for-each>
</xsl:for-each>
</scl1001>
</xsl:template>
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