Abstract Patterns in SCH v/s Pure #146

pradyumanaggarwal · 2023-05-18T09:40:49Z

pradyumanaggarwal
May 18, 2023

I was using SchematronResourcePure implementation, and trying out abstract pattern. But, same abstract pattern works in pure implementation but not in SCH. Getting few errors but if i tried to resolve those errors, then they dissolves the purpose of abstract patterns.

Schematron file :

<?xml version="1.0" encoding="UTF-8"?>
<sch:schema xmlns="http://purl.oclc.org/dsdl/schematron" xmlns:sch="http://purl.oclc.org/dsdl/schematron"
  xmlns:sqf="urn:anything"
  queryBinding="xslt2" schemaVersion="ISO19757-3">  <sch:title>Schematron 1</sch:title>
  <sch:pattern abstract="true" id="LimitNoOfWords">
   <sch:rule context="$parentElement">
     <sch:let name="words" value="string-length(.)"/>
     <sch:assert test="$words &gt; $maxWords">
    You have <sch:value-of select="$words"/> word(s).
     </sch:assert>
     <sch:assert test="$words &lt; $minWords">
    You have <sch:value-of select="$words"/> word(s).
     </sch:assert>
   </sch:rule>
	</sch:pattern>
  <sch:pattern is-a="LimitNoOfWords">
   <sch:param name="parentElement" value="title"/>
    	<param name="minWords" value="1"/>
    	 <param name="maxWords" value="8"/>
  </sch:pattern>
  
</sch:schema>

SCH Implementation :

final ISchematronResource schemaResource = SchematronResourceSCH.fromFile(this.schematronFile);
SchematronOutputType svrl = schemaResource.applySchematronValidationToSVRL(doc, null);

where doc is xml docuement.

Pure Implementation :

ISchematronResource schemaResource = SchematronResourcePure.fromInputStream(streamSchematron);
aResSchematron.applySchematronValidationToSVRL(dom);

where dom is xml node.

Anyone has any idea ? @phax

phax · 2023-05-18T09:54:50Z

phax
May 18, 2023
Maintainer

~~Eventally, because the last 2 params use <param instead of <sch:param ???~~
Sorry, just saw that you have both namespaces on top

I found the issue: the pattern that uses is-a also needs to have an id attribute. Then it works.
@pradyumanaggarwal

0 replies

pradyumanaggarwal · 2023-05-25T09:35:44Z

pradyumanaggarwal
May 25, 2023
Author

When using SchematronResourceSCH, can we write XPATHS in context ?

For ex :

XML :

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE topic PUBLIC "-//OASIS//DTD DITA Topic//EN" "technicalContent/dtd/topic.dtd">
<topic id="GUID-84fa6d91-8506-4d06-9595-ebabc6f8b46f-enHYPHENUS" xml:lang="en-US">
  <title>Sample</title>
  <shortdesc>This short description is too short. Or too long? The recommendation is, that the short description should have around twenty words.</shortdesc>
  <body>
    <p>This text is using the &quot;straight quotes&quot; which should be reported.</p>
    <p>This text is using the «straight quotes» which should be reported.</p>
    <p>This paragraph contains the word Content.</p>
  </body>
</topic>

Here, i won't get any output if i use this schematron file :

<?xml version="1.0" encoding="UTF-8"?>
<sch:schema xmlns:sch="http://purl.oclc.org/dsdl/schematron" queryBinding="xslt2">
   <sch:title>Schematron Stefan</sch:title>
   <sch:pattern id="quotation-marks-en">
      <sch:rule context="//text()[ancestor::*[@xml:lang = 'en-US']]">
         <sch:assert role="info" subject="text()" test="not(matches(., '«|»|„'))">Please use the correct typographic quotes for the English language (“” and ‘’).</sch:assert>
         <sch:assert role="info" subject="text()" test="matches(., '«|»|„')">Please use the correct typographic quotes for the English language (“” and ‘’).</sch:assert>
      </sch:rule>
   </sch:pattern>
</sch:schema>

But i will get validation errors if i use context="body" .
@phax

9 replies

phax May 26, 2023
Maintainer

I think that is an XPath specialty. As you can generate text() from any node. I am not that deep into XPath to explain it in all detail, but non-element nodes are usually tricky. So try to always base your selectors on elements (like * ;-) ) and take it from there. E.g. be more precise in single asserts.

pradyumanaggarwal May 29, 2023
Author

Thanks, it helps a lot.
Do we have any documentation for the limitations in XPATHS or anything like that ?
@phax

phax May 29, 2023
Maintainer

Well, there is the XPath 2.0 Specification from W3C....

https://www.w3.org/TR/xpath20/

pradyumanaggarwal May 29, 2023
Author

Does this means we don’t have support for XPATH 3.0?

phax May 29, 2023
Maintainer

That depends on the XPath processor you are using. Saxon it is by default when using ph-schematron. I think it supports XPath 3.0 but please crosscheck on their side....

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