how to apply parallel template definitions in XSLT 2.0 - json

Question

I'm very new to XSLT, and this sample looked like a great way to learn, but for the life of me can't get it to work. I'm trying to tokenize 2 different strings in parallel and combine them into a JSON array. So I want to tokenize measTypes[0] and match to measResults[0], then measTypes[1] and match to measResults[1], and so on
Sample XML
<?xml version="1.0" encoding="UTF-8"?>
<measInfo measInfoId="1542455297">
<measTypes>1542455297 1542455298 1542455299 1542455300 1542455301 1542455302 1542455303 1542455304 1542455305 1542455306 1542455307 1542460296 1542460297 </measTypes>
<measValue measObjLdn="LTHAB0113422/ETHPORT:Cabinet No.=0, Subrack No.=1, Slot No.=7, Port No.=0, Subboard Type=BASE_BOARD">
<measResults>116967973 585560 496041572 682500 0 12583680 72080 520454 46670568 73432 2205837 1000000 1000000 </measResults>
</measValue>
<measValue measObjLdn="LTHAB0113422/ETHPORT:Cabinet No.=0, Subrack No.=1, Slot No.=7, Port No.=1, Subboard Type=BASE_BOARD">
<measResults>0 0 0 0 0 0 0 0 0 0 0 0 0 </measResults>
</measValue>
</measInfo>
XSLT 2.0 that I have so far
<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform” xmlns:xs="http://www.w3.org/2001/XMLSchema” exclude-result-prefixes=“xs" version="2.0">
<xsl:output method="text" encoding="UTF-8" media-type="text/plain"/>
<xsl:strip-space elements="*"/>
<!--
<xsl:template match="/measInfo/measValue/measResults" name="measRes">
<xsl:for-each select=".">
{'measResult':{<xsl:value-of select="tokenize(normalize-space(.),'\s+')"/>}
</xsl:for-each>
</xsl:template>
-->
<xsl:template match="/" name="measObj">
[
<xsl:for-each select="measInfo/measValue">
'measObjLdn':'<xsl:value-of select="#measObjLdn"/>'
<xsl:call-template name="types"/>
</xsl:for-each>
]
<xsl:apply-templates />
</xsl:template>
<xsl:template match="/measInfo" name="types" >
'Metrics':[
<xsl:for-each select="tokenize(normalize-space(measTypes),'\s+')">
{'measType':'<xsl:value-of select="."/>'},<!-- <xsl:call-template name="measRes"/> -->
</xsl:for-each>
]
</xsl:template>
</xsl:stylesheet>
The JSON results I'm hoping for
[
'measObjLdn':"LTHAB0113422/ETHPORT:Cabinet No.=0, Subrack No.=1, Slot No.=7, Port No.=0, Subboard Type=BASE_BOARD",
'Metrics':[
{'measType':'1542455297','measResult':116967973},
{'measType':'1542455298','measResult':585560},
{'measType':'1542455299','measResult':496041572},
{'measType':'1542455300','measResult':682500},
{'measType':'1542455301','measResult':0},
{'measType':'1542455302','measResult':12583680},
{'measType':'1542455303','measResult':72080},
{'measType':'1542455304','measResult':520454},
{'measType':'1542455305','measResult':46670568},
{'measType':'1542455306','measResult':73432},
{'measType':'1542455307','measResult':2205837},
{'measType':'1542460296','measResult':1000000},
{'measType':'1542460297','measResult':1000000}
]
'measObjLdn':"LTHAB0113422/ETHPORT:Cabinet No.=0, Subrack No.=1, Slot No.=7, Port No.=1, Subboard Type=BASE_BOARD",
'Metrics':[
{'measType':'1542455297','measResult':0},
{'measType':'1542455298','measResult':0},
{'measType':'1542455299','measResult':0},
{'measType':'1542455300','measResult':0},
{'measType':'1542455301','measResult':0},
{'measType':'1542455302','measResult':0},
{'measType':'1542455303','measResult':0},
{'measType':'1542455304','measResult':0},
{'measType':'1542455305','measResult':0},
{'measType':'1542455306','measResult':0},
{'measType':'1542455307','measResult':0},
{'measType':'1542460296','measResult':0},
{'measType':'1542460297','measResult':0}
]
]

Answer 1

XPath 3.0 (and therefore XSLT 3.0) has features you can combine to do just this:
<xsl:value-of select="for-each-pair(tokenize(measTypes), tokenize(measInfo/measValue), function($t, $v) {
serialize(map{'measType':$t, 'measValue':$v}, map{'method':'json'})
})" separator=",&#a;"/>

Answer 2

Here is one way to process two sequences pairwise:
<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:xs="http://www.w3.org/2001/XMLSchema"
xmlns:math="http://www.w3.org/2005/xpath-functions/math"
exclude-result-prefixes="xs math"
version="2.0">
<xsl:strip-space elements="*"/>
<xsl:output media-type="text"/>
<xsl:template match="measInfo">
<xsl:variable name="types" select="tokenize(normalize-space(measTypes), '\s+')"/>
[
<xsl:apply-templates select="measValue">
<xsl:with-param name="types" select="$types"/>
</xsl:apply-templates>
]
</xsl:template>
<xsl:template match="measValue">
<xsl:param name="types"/>
{ 'measObjLdn' : '<xsl:value-of select="#measObjLdn"/>' },
<xsl:variable name="values" select="tokenize(normalize-space(), '\s+')"/>
'Metrics' :
[
<xsl:for-each select="$types">
<xsl:variable name="pos" select="position()"/>
<xsl:if test="$pos > 1">,
</xsl:if>
{ 'measTypes' : '<xsl:value-of select="."/>', 'measResult' : '<xsl:value-of select="$values[$pos]"/>' }
</xsl:for-each>
]
</xsl:template>
</xsl:stylesheet>
The output is not well-formatted but you should be able to improve that using xsl:text yourself.