xslt reuse key multiple times

Context: starting to learn xslt, and having an issue on grouping/keys

so, I have this input XML:


<?xml version="1.0" encoding="UTF-8"?>
<?xml-stylesheet href="getInfoMinimal.xml" type="text/xsl" ?>
<domaines>
    <domaine Name="someDomain">
        <application name="someApplication1">
            <module id="0001">
                <env-entry>ejb/test</env-entry>
                <requirement>Queue1</requirement>
            </module>
            <module id="0002">
                <env-entry>ejb/notherTest</env-entry>
                <requirement>Queue1</requirement>
            </module>
            <module id="0003">
                <env-entry>ejb/notherTest2</env-entry>
                <requirement>Datasource1</requirement>
            </module>
            <module id="0004">
                <env-entry>ejb/notherTest3</env-entry>
                <requirement>Datasource1</requirement>
            </module>
        </application>
        <application name="someApplication2">
            <module id="0001">
                <env-entry>ejb/test</env-entry>
                <requirement>Queue1</requirement>
            </module>
            <module id="0002">
                <env-entry>ejb/notherTest</env-entry>
                <requirement>Queue1</requirement>
            </module>
            <module id="0003">
                <env-entry>ejb/notherTest2</env-entry>
                <requirement>Datasource1</requirement>
            </module>
            <module id="0004">
                <env-entry>ejb/notherTest3</env-entry>
                <requirement>Datasource1</requirement>
            </module>
            <module id="0001">
                <env-entry>ejb/test</env-entry>
                <requirement>Queue1</requirement>
            </module>
            <module id="0002">
                <env-entry>ejb/notherTest</env-entry>
                <requirement>Queue1</requirement>
            </module>
            <module id="0003">
                <env-entry>ejb/notherTest2</env-entry>
                <requirement>Datasource1</requirement>
            </module>
            <module id="0004">
                <env-entry>ejb/notherTest3</env-entry>
                <requirement>Datasource3</requirement>
            </module>
        </application>
    </domaine>
</domaines>

and this xlst file(getInfoMinimal.xml):


<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet
version="2.0"
xmlns:xsl="http://ift.tt/tCZ8VR" xmlns="http://ift.tt/lH0Osb">

    <xsl:output method="xml" indent="yes" encoding="UTF-8"/>

    <xsl:key name="modules-by-requirement" match="module" use="requirement" />

    <xsl:template match="/">
        <html>
            <head>
                <title><xsl:value-of select="/domaines/domaine/@Name"/></title>
            </head>
            <body>
                <xsl:for-each select="/domaines/domaine/application">
                    <h1><xsl:value-of select="./@name"/></h1>
                    <xsl:for-each select="module[count(. | key('modules-by-requirement', requirement)[1]) = 1]">
                        <!--<xsl:sort select="requirement" />-->
                        <xsl:value-of select="requirement" /><br />
                        <xsl:for-each select="key('modules-by-requirement', requirement)">
                        <!--<xsl:sort select="env-entry" />
                        <xsl:value-of select="env-entry" /> (<xsl:value-of select="blabla" />)<br />-->
                        </xsl:for-each>
                    </xsl:for-each>
                </xsl:for-each>
            </body>
        </html>
    </xsl:template>

</xsl:stylesheet>

I'm trying to render it to a html page that lists per application all the requirements that its modules have.

rules implied by the input XML:

1 application can have 1 or more modules

1 module can have 1 or more unique requirements

multiple modules can have the same requirements

multiple applications can not have the same modules

multiple applications can have the same requirements.

Current result:

someApplication1

Queue1

Datasource1

someApplication2

Datasource3

wanted result:

someApplication1

Queue1

Datasource1

someApplication2

Queue1

Datasource1

Datasource3

as you can see, the Queue1 and Datasource1 are not in the 'someApplication2' result, even though I want them to be.

Any and all help will be appreciated

xslt reuse key multiple times

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