Selecting the first and second node in XSLT - xslt

Question

Given the following structure, how to copy the first and the second nodes with all their elements from the document based on the predicate in XSLT:
<list>
<slot>xx</slot>
<data>
<name>xxx</name>
<age>xxx</age>
</data>
<data>
<name>xxx</name>
<age>xxx</age>
</data>
<data>
<name>xxx</name>
<age>xxx</age>
</data>
</list>
<list>
<slot>xx</slot>
<data>
<name>xxx</name>
<age>xxx</age>
</data>
<data>
<name>xxx</name>
<age>xxx</age>
</data>
<data>
<name>xxx</name>
<age>xxx</age>
</data>
</list>
How to select the first and the second occurence of data (without the data element itself, only name, age) from the list, where the slot is equal to a different variable, i.e the first list has the slot=02, but I need the data from the second list, where the slot=01. But it does not really matter the order of the list by a slot as long as slot=$slotvariable.
I tried the following statement, but it did not produce any results:
<xsl:element name="{'Lastdata'}">
<xsl:copy-of select="list/data[position()=1 and slot = $slotvariable]" />
</xsl:element>
<xsl:element name="{'prevdata'}">
<xsl:copy-of select="list/data[position()=2 and slot = $slotvariable]" />
</xsl:element>
Any working suggestions would be appreciated

Answer 1

If I understood your question correctly, then:
<Lastdata>
<xsl:copy-of select="list[slot=$slotvariable]/data[1]/*" />
</Lastdata>
<prevdata>
<xsl:copy-of select="list[slot=$slotvariable]/data[2]/*" />
<prevdata>
Hints:
Don't use <xsl:element> unless you have a dynamic name based on an expression.
[1] is a shorthand for [position() = 1]

Answer 2

The following stylesheet:
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:variable name="slot" select="'slot1'"/>
<xsl:template match="/lists/list">
<xsl:copy-of select="data[../slot=$slot][position()<3]/*"/>
</xsl:template>
</xsl:stylesheet>
Applied to this source:
<lists>
<list>
<slot>slot1</slot>
<data>
<name>George</name>
<age>7</age>
</data>
<data>
<name>Bob</name>
<age>22</age>
</data>
<data>
<name>James</name>
<age>77</age>
</data>
</list>
<list>
<slot>slot2</slot>
<data>
<name>Wendy</name>
<age>25</age>
</data>
</list>
</lists>
Produces the following result:
<name>George</name>
<age>7</age>
<name>Bob</name>
<age>22</age>