I could not retrieve xml attrubutes from xml inputs

                    <?xml version="1.0" encoding="UTF-8"?>
            <p:transformOutput xmlns:p="http://cfpe/export/objects">
                <p:objectSet>
                    <p:objects>
                        <p:object>
                            <p:objectAttributes>
                                <p:objectType>a</p:objectType>
                                <p:attribute name="x">F600</p:attribute>
                                <p:attribute name="y">A100</p:attribute>
                                <p:attribute name="z">D400</p:attribute>
                            </p:objectAttributes>
                        </p:object>
                        <p:object>
                            <p:objectAttributes>
                                <p:objectType>b</p:objectType>
                                <p:attribute name="x">F600</p:attribute>
                                <p:attribute name="y">C300</p:attribute>
                                <p:attribute name="z">B200</p:attribute>
                            </p:objectAttributes>
                        </p:object>
                        <p:object>
                            <p:objectAttributes>
                                <p:objectType>b</p:objectType>
                                <p:attribute name="x">a</p:attribute>
                                <p:attribute name="y">A100</p:attribute>
                                <p:attribute name="z">B200</p:attribute>
                            </p:objectAttributes>
                        </p:object>
                    </p:objects>
                </p:objectSet>

            <ns1:Templates>
                <ns1:Template>
                    <ns1:System_Class>a</ns1:System_Class>
                    <ns1:System_Table>A100</ns1:System_Table>
                    <ns1:System_Attribute>aA</ns1:System_Attribute>
                </ns1:Template>
                <ns1:Template>
                    <ns1:System_Class>b</ns1:System_Class>
                    <ns1:System_Table>B200</ns1:System_Table>
                    <ns1:System_Attribute>bB</ns1:System_Attribute>
                </ns1:Template>
            </ns1:Templates>

xsl

            <?xml version="1.0" encoding="UTF-8"?>
            <xsl:stylesheet version="1.0"
            xmlns:xsl="http://ift.tt/tCZ8VR"
            xmlns:p="http://cfpe/export/objects" xmlns:ns1="http://cfpe/export/objects"
            exclude-result-prefixes="p">
            <xsl:output method="xml" version="1.0" encoding="UTF-8" indent="yes"/>
            <xsl:strip-space elements="*"/>

            <xsl:template match="/p:transformOutput">
                <objects>
                    <xsl:for-each select="p:transformOutput/p:objectSet/p:objects/p:object">
                        <object type="{p:objectAttributes/p:objectType}">
                            <xsl:variable name="attributes" select="p:objectAttributes/*" />
                            <xsl:variable name="matching-template" select="p:transformOutput/ns1:Templates/ns1:Template[ns1:System_Class=$attributes and ns1:System_Table=$attributes]" />
                            <template>
                               <xsl:value-of select="tns:System_Attribute"/>
                            </template>
                        </object>
                    </xsl:for-each>     
                </objects>
            </xsl:template>

            </xsl:stylesheet> 

matching-template doesn't seem to find the value path. I was trying to compare System_Class if exists in objectAttributes and get the System_Attribute from if the value of the System_Attribute doesn't exist in the objectAttributes