The pipeline
<p:declare-step xmlns:p="http://www.w3.org/ns/xproc" xmlns:xs="http://www.w3.org/2001/XMLSchema" version="3.0" exclude-inline-prefixes="xs">
<p:output port="result"/>
<p:json-merge key="'key1'" duplicates="combine">
<p:with-input expand-text="false">
<p:inline content-type="application/json">{"key1" : "value"}</p:inline>
<p:inline content-type="application/json">"one"</p:inline>
</p:with-input>
</p:json-merge>
<p:variable name="seq" as="xs:string+" select=".?key1"/>
<p:identity>
<p:with-input>
<result>
<value1>{$seq[1]}</value1>
<value2>{$seq[2]}</value2>
</result>
</p:with-input>
</p:identity>
</p:declare-step>
Schematron validation
<s:schema xmlns:s="http://purl.oclc.org/dsdl/schematron" queryBinding="xslt2">
<s:pattern>
<s:rule context="/">
<s:assert test="result">The document node is not 'result'.</s:assert>
<s:assert test="result/value1 = 'value'">First value is not 'value'.</s:assert>
<s:assert test="result/value2 = 'one'">Second value is not 'one'.</s:assert>
</s:rule>
</s:pattern>
</s:schema>
