Saxon » SaxonJS

The problem can be demonstrated by making a variant of test regex-syntax-091 as follows:

<test-case name="regex-syntax-0191b">
      <description>see regex-syntax-0001</description>
      <created by="Michael Kay" on="2012-11-07"/>
      <environment ref="regex-syntax"/>
      <test>
         <param name="regex" as="xs:string" select="'\P{P}*'"/>
         <param name="match" as="xs:string" select="'&#xb2;'"/>
         <param name="nonmatch" as="xs:string" select="'&#xab;'"/>
         <param name="delimiter" as="xs:string" select="','"/>
         <initial-template name="go"/>
      </test>
      <result>
         <assert>/true</assert>
      </result>
   </test-case>

The character xAB matches category Pi; therefore it matches P; therefore it should not match \P{P}. But it does match, because it falls into one of the gaps in the Pc subcategory.