retrieving current node in sequence when looping over this sequence in an xpath predicate - xslt-2.0

Question

I need to convert this input xml:
<Problems>
<problem location="engineroom/boiler/nozzle"/>
<problem location="engineroom/boiler/nozzle/leak"/>
<problem location="office/printer/paper"/>
<problem location="office/printer/paper/empty/A4"/>
<problem location="office/printer/paper/empty/A3"/>
<problem location="garage/truck/window"/>
<problem location="garage/truck/window/crack"/>
</Problems>
to this output xml:
<Problems>
<problem ignore="leak"/>
<problem ignore="leak"/>
<problem ignore="empty"/>
<problem ignore="empty"/>
<problem ignore="empty"/>
<problem location="garage/truck/window"/>
<problem location="garage/truck/window/crack"/>
</Problems>
My current code involves hardcoding the items of interest ('leak', 'empty') and its parent element ('nozzle', 'paper'):
<xsl:template match="#* | node()">
<xsl:copy>
<xsl:apply-templates select="#* | node()"/>
</xsl:copy>
</xsl:template>
<xsl:template match="problem[contains(#location, 'leak')]
| problem[ends-with(#location, 'nozzle')][contains(following-sibling::problem[1]/#location, 'nozzle/leak')]">
<xsl:apply-templates select="." mode="display">
<xsl:with-param name="location" select="'leak'"/>
</xsl:apply-templates>
</xsl:template>
<xsl:template match="problem[contains(#location, 'empty')]
| problem[ends-with(#location, 'paper')][contains(following-sibling::problem[1]/#location, 'paper/empty')]">
<xsl:apply-templates select="." mode="display">
<xsl:with-param name="location" select="'empty'"/>
</xsl:apply-templates>
</xsl:template>
<xsl:template match="problem[contains(#location, 'burnt')]
| problem[ends-with(#location, 'PCB')][contains(following-sibling::problem[1]/#location, 'PCB/burnt')]">
<xsl:apply-templates select="." mode="display">
<xsl:with-param name="location" select="'burnt'"/>
</xsl:apply-templates>
</xsl:template>
<xsl:template match="problem" mode="display">
<xsl:param name="location"/>
<problem ignore="{$location}"/>
</xsl:template>
What I've tried is the following. But I don't know how to pass the current node in the sequence (e.g. 'leak') to the "display" template. Also, please let me know if there's a better way than this ugly matching expression. Thanks!
<xsl:variable name="issues">
<issue name="leak" parent="nozzle"/>
<issue name="empty" parent="paper"/>
<issue name="burnt" parent="PCB"/>
</xsl:variable>
<xsl:template match="problem[true() = (for $i in $issues/issue return if(
contains(#location,$i/#name)
or ends-with(#location, $i/parent) and contains(following-sibling::problem[1]/#location,$i/#name)
) then true() else false())]">
<xsl:apply-templates select="." mode="display">
<xsl:with-param name="location" select="'???'"/>
</xsl:apply-templates>
</xsl:template>

Answer 1

This XSLT 2.0 transformation:
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output omit-xml-declaration="yes" indent="yes"/>
<xsl:key name="kIgnorable" match="problem" use=
"generate-id(current())
[$pIgnorable/p[contains(current()/#location, concat('/', #part, '/', issue))]]"/>
<xsl:param name="pIgnorable">
<p part="nozzle">
<issue>leak</issue>
</p>
<p part="paper">
<issue>empty</issue>
</p>
<p part="PCB">
<issue>burnt</issue>
</p>
</xsl:param>
<xsl:template match="node()|#*">
<xsl:copy>
<xsl:apply-templates select="node()|#*"/>
</xsl:copy>
</xsl:template>
<xsl:template match="problem
[
for $part in tokenize(#location, '/')[last()][. = $pIgnorable/p/#part],
$issue in $pIgnorable/p[#part = $part]/issue
return
following-sibling::problem[1]
[
contains(#location, concat('/', $part, '/', $issue))
]
]">
<xsl:variable name="vPart" select="tokenize(#location, '/')[last()]"/>
<xsl:variable name="vIssue" select=
"substring-before(concat(following-sibling::problem[1]
/substring-after(#location,
concat('/', $vPart, '/')), '/'), '/')
"/>
<problem ignore="{$vIssue}"/>
</xsl:template>
<xsl:template match="problem[key('kIgnorable', generate-id())]">
<xsl:variable name="vIgnoreRule"
select="$pIgnorable/p[contains(current()/#location,
concat('/', #part, '/', issue))]"/>
<problem ignore="{$vIgnoreRule/issue}"/>
</xsl:template>
</xsl:stylesheet>
when applied on the provided XML document:
<Problems>
<problem location="engineroom/boiler/nozzle"/>
<problem location="engineroom/boiler/nozzle/leak"/>
<problem location="office/printer/paper"/>
<problem location="office/printer/paper/empty/A4"/>
<problem location="office/printer/paper/empty/A3"/>
<problem location="garage/truck/window"/>
<problem location="garage/truck/window/crack"/>
</Problems>
produces the wanted, correct result:
<Problems>
<problem ignore="leak"/>
<problem ignore="leak"/>
<problem ignore="empty"/>
<problem ignore="empty"/>
<problem ignore="empty"/>
<problem location="garage/truck/window"/>
<problem location="garage/truck/window/crack"/>
</Problems>

Answer 2

I am not sure I have understood the problem but the algorithm presented seems to be implementable in XSLT 3 as
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:xs="http://www.w3.org/2001/XMLSchema"
xmlns:map="http://www.w3.org/2005/xpath-functions/map"
exclude-result-prefixes="#all"
version="3.0">
<xsl:param name="relations" as="map(xs:string, xs:string)"
select="map { 'leak' : 'nozzle', 'empty' : 'paper' }"/>
<xsl:variable name="relation-keys" select="map:keys($relations)"/>
<xsl:mode on-no-match="shallow-copy"/>
<xsl:template match="problem[some $key in $relation-keys satisfies contains(#location, $key)]">
<xsl:apply-templates select="." mode="display">
<xsl:with-param name="location" select="$relation-keys[contains(current()/#location, .)]"/>
</xsl:apply-templates>
</xsl:template>
<xsl:template match="problem[some $key in $relation-keys
satisfies (ends-with(#location, $relations($key)) and contains(following-sibling::problem[1]/#location, $key))]">
<xsl:apply-templates select="." mode="display">
<xsl:with-param name="location" select="$relation-keys[ends-with(current()/#location, $relations(.)) and contains(current()/following-sibling::problem[1]/#location, .)]"/>
</xsl:apply-templates>
</xsl:template>
<xsl:template match="problem" mode="display">
<xsl:param name="location"/>
<problem ignore="{$location}"/>
</xsl:template>
</xsl:stylesheet>