Tests p:system-property() in static analysis.
Test ab-system-property-010.xml is expected to pass.
<p:declare-step xmlns:p="http://www.w3.org/ns/xproc" version="3.0">
   <p:output port="result">
   <p:identity use-when="p:system-property('p:vendor')">
      <p:with-input>
         <correct/>
      </p:with-input>
   </p:identity>
   <p:identity use-when="not(p:system-property('p:vendor'))">
      <p:with-input>
         <incorrect/>
      </p:with-input>
   </p:identity>
</p:declare-step>
<s:schema xmlns="http://www.w3.org/1999/xhtml" xmlns:s="http://purl.oclc.org/dsdl/schematron" queryBinding="xslt2">
   <s:pattern>
      <s:rule context="/">
         <s:assert test="correct">The document root is not 'correct'.</s:assert>
      </s:rule>
   </s:pattern>
</s:schema>
Added attribute 'queryBinding' to schematron's schema.
Added tests for p:system-property