XSLT combine node when attribute's value are different - xslt

Question

During transformation, who I can combine one node into another. for example, when Attributes/Attribute/Type=ComplexAttr then it should go under Attributes/Attribute/Type=Common only.
Below is the sample XML & XSLT that I'm trying to use which is not working. TIA (Thanks in Advance)
<?xml version="1.0" encoding="utf-8"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:key name="type" match="Attribute" use="Type"/>
<xsl:template match="/">
<Data Schema="XML A">
<xsl:apply-templates select="XML/Attributes/Attribute">
<xsl:sort select="Type" order="descending"/>
</xsl:apply-templates>
<errorCodes>
<xsl:apply-templates select="XML/Attributes/Attribute"
mode="errors"/>
</errorCodes>
</Data>
</xsl:template>
<xsl:template
match="Attribute[generate-id()=generate-id(key('type', Type)[1])]">
<xsl:if test="Type != 'ComplexAttr'">
<Attributes type="{Type}">
<xsl:if test="Type = 'ComplexAttr'">
<xsl:value-of select="Common"/>
</xsl:if>
<xsl:apply-templates select="../Attribute[Type=current()/Type]" mode="out"/>
</Attributes>
</xsl:if>
</xsl:template>
<xsl:template match="Attribute" mode="out">
<Attr id="{id}" name="{Name}" value="{Value}"/>
</xsl:template>
<xsl:template match="Attribute"/>
<xsl:template match="Attribute" mode="errors"/>
<xsl:template match="Attribute[Value='']" mode="errors">
<errorCode>"value for <xsl:value-of select="Name"/> is missing."</errorCode>
</xsl:template>
<xsl:template match="/Attribute">
<xsl:if test="Type = 'ComplexAttr'">
<Attributes type="Common">
<xsl:apply-templates select="../Attribute[Type=current()/Type]" mode="out"/>
<!--<Attr id="{id}" name="{Name}" value="{Value}"/>-->
</Attributes>
</xsl:if>
</xsl:template>
</xsl:stylesheet>
---- Source XML ----
<?xml version="1.0" encoding="windows-1252"?>
<XML>
<Attributes>
<Attribute>
<id>5</id>
<Name>Buyer ID</Name>
<Type>common</Type>
<Value>Lee</Value>
</Attribute>
<Attribute>
<id>331</id>
<Name>Enviornment</Name>
<Type>common</Type>
<Value>Development</Value>
</Attribute>
<Attribute>
<id>79</id>
<Name>Retail</Name>
<Type>common</Type>
<Value></Value>
</Attribute>
<Attribute>
<id>402</id>
<Name>Gender</Name>
<Type>category</Type>
<Value>Men</Value>
</Attribute>
<Attribute>
<id>1197</id>
<Name>UPC</Name>
<Type>ComplexAttr</Type>
<Value>Testing</Value>
<Path />
</Attribute>
</Attributes>
</XML>
---- Transformed XML output
<?xml version="1.0" encoding="utf-8"?>
<Data Schema="XML A">
<Attributes type="common">
<Attr id="5" name="Buyer ID" value="Lee" />
<Attr id="331" name="Enviornment" value="Development" />
<Attr id="79" name="Retail" value="" />
<Attr id="41" name="PlusShip" value="False" />
<Collection id="" name="test">
<ComplexAttr refId="0">
<MaskValue />
<Attr id="1197" name="UPC" value="Testing" />
</ComplexAttr>
</Collection>
</Attributes>
<Attributes type="category">
<Attr id="402" name="Gender" value="Men" />
<Attr id="433" name="HeelHeight" value="" />
</Attributes>
<errorCodes>
<errorCode>"value for Retail is missing."</errorCode>
</errorCodes>
</Data>

Answer 1

If you want to group Attribute by Type with 'common' and 'ComplexAttr' in the same group, then you need to change the key value expression into something like:
<xsl:key name="type"
match="Attribute"
use="concat(
Type[. != 'ComplexAttr'],
substring(
'common',
1 div (Type = 'ComplexAttr')
)
)"/>
<xsl:template match="Attribute[
generate-id()
= generate-id(
key('type',
concat(
Type[. != 'ComplexAttr'],
substring(
'common',
1 div (Type = 'ComplexAttr')
)
)
)[1]
)
]">
EDIT: And in the group templates applying:
<xsl:apply-templates select="key('type',
concat(
Type[. != 'ComplexAttr'],
substring(
'common',
1 div (Type = 'ComplexAttr')
)
)
)"
mode="out"/>
EDIT: Full example. This stylesheet:
<!DOCTYPE xsl:stylesheet [
<!ENTITY key "concat(Type[. != 'ComplexAttr'],substring('common',1 div (Type = 'ComplexAttr')))">
]>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:key name="type" match="Attribute" use="&key;"/>
<xsl:template match="/">
<Data Schema="XML A">
<xsl:apply-templates
select="XML/Attributes/Attribute[
generate-id() = generate-id(key('type', &key;)[1])
]">
<xsl:sort select="&key;" order="descending"/>
</xsl:apply-templates>
<errorCodes>
<xsl:apply-templates select="XML/Attributes/Attribute"
mode="errors"/>
</errorCodes>
</Data>
</xsl:template>
<xsl:template match="Attribute">
<xsl:variable name="vCurrent-Grouping-Key" select="&key;"/>
<Attributes type="{$vCurrent-Grouping-Key}">
<xsl:apply-templates select="key('type',$vCurrent-Grouping-Key)"
mode="out"/>
</Attributes>
</xsl:template>
<xsl:template match="Attribute" mode="out" name="makeAttr">
<Attr id="{id}" name="{Name}" value="{Value}"/>
</xsl:template>
<xsl:template match="Attribute[Type='ComplexAttr']" mode="out">
<Collection id="" name="test">
<ComplexAttr refId="0">
<MaskValue />
<xsl:call-template name="makeAttr"/>
</ComplexAttr>
</Collection>
</xsl:template>
<xsl:template match="Attribute" mode="errors"/>
<xsl:template match="Attribute[Value='']" mode="errors">
<errorCode>"value for <xsl:value-of select="Name"/> is missing."</errorCode>
</xsl:template>
</xsl:stylesheet>
Output:
<Data Schema="XML A">
<Attributes type="common">
<Attr id="5" name="Buyer ID" value="Lee" />
<Attr id="331" name="Enviornment" value="Development" />
<Attr id="79" name="Retail" value="" />
<Collection id="" name="test">
<ComplexAttr refId="0">
<MaskValue />
<Attr id="1197" name="UPC" value="Testing" />
</ComplexAttr>
</Collection>
</Attributes>
<Attributes type="category">
<Attr id="402" name="Gender" value="Men" />
</Attributes>
<errorCodes>
<errorCode>"value for Retail is missing."</errorCode>
</errorCodes>
</Data>