I don't think you need grouping for your Alert
issues. It looks like you simply want to output Alert issues which are referenced by "Item/Issue" records.
So, what you can do, is define a key like to look up "Item/Issue" records by id.
<xsl:key name="issue" match="report:Item/report:Issue" use="@Id"/>
Then, to get only Alert
elements with referenced Issue
elements, you can do this...
<xsl:for-each select="//report:Alert[report:Issue[key('issue', @Id)]]">
And within this, you can get the issues like so
<xsl:for-each select="report:Issue[key('issue', @Id)]">
As for the listing of the Operation
elements, it looks like you now want to group the issues by parent operation name, and by issue type, so you need a concatenated key like so:
<xsl:key name="type" match="report:Item" use="concat(../@Name, '|', @Type)"/>
You can then use it in the same way though. Try this XSLT
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:report="http://schemas.microsoft.com/sqlserver/dac/DeployReport/2012/02"
exclude-result-prefixes="report">
<xsl:key name="type" match="report:Item" use="concat(../@Name, '|', @Type)"/>
<xsl:key name="issue" match="report:Item/report:Issue" use="@Id"/>
<xsl:template match="/">
<html>
<body>
<table style="border:1px solid;" align="center">
<xsl:for-each select="//report:Alert[report:Issue[key('issue', @Id)]]">
<tr style="text-align:center;">
<td style="color:red">
<xsl:value-of select="@Name"/>
</td>
</tr>
<xsl:for-each select="report:Issue[key('issue', @Id)]">
<tr>
<td>
<xsl:value-of select="@Value"/>
</td>
</tr>
</xsl:for-each>
</xsl:for-each>
</table>
<table style="border:1px solid;" align="center">
<xsl:for-each select="//report:Operation/report:Item[generate-id() = generate-id(key('type', concat(../@Name, '|', @Type))[1])]">
<tr style="text-align:center;">
<td style="color:red">
<xsl:value-of select="concat(../@Name, ' - ', @Type)"/>
</td>
</tr>
<xsl:for-each select="key('type', concat(../@Name, '|', @Type))">
<tr>
<td>
<xsl:value-of select="@Value"/>
</td>
</tr>
</xsl:for-each>
</xsl:for-each>
</table>
</body>
</html>
</xsl:template>
</xsl:stylesheet>
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