Why RelaxNG validator reports an error on xmlns attribute?

angelozerr commented 2 years ago

I'm starting to integrate Jing in your XML Language Server to provide validation and completion for RelaxNG. I tried this sample:

<?xml version="1.0" encoding="UTF-8"?>
<?xml-model href="http://www.tei-c.org/release/xml/tei/custom/schema/relaxng/tei_lite.rng" type="application/xml" schematypens="http://relaxng.org/ns/structure/1.0"?
<?xml-model href="http://www.tei-c.org/release/xml/tei/custom/schema/relaxng/tei_lite.rng" type="application/xml" schematypens="http://purl.oclc.org/dsdl/schematron"?>
<TEI xmlns="http://www.tei-c.org/ns/1.0">
  <teiHeader>
    <fileDesc>
      <titleStmt>
        <title>Title</title>
      </titleStmt>
      <publicationStmt>
        <p>Publication information</p>
      </publicationStmt>
      <sourceDesc>
        <p>Information about the source</p>
      </sourceDesc>
    </fileDesc>
  </teiHeader>
  <text>
    <body>
      <p>Some text here.</p>
    </body>
  </text>
</TEI>

that we can found at https://digital-editing.fas.harvard.edu/editor/

And I have an error on xmlns attribute:

Do you think it is a bug from Jing or some Jing configuration which is not done correctly?

ndw commented 2 years ago

Are you sure you're parsing with namespace support enabled? What API are you using for parsing? The "attribute" named xmlns should not be reported as an attribute if namepace support is enabled.

angelozerr commented 2 years ago

Thanks so much @ndw for your comment. I fixed my problem and it was indeed a namespace. I use Xerces SAXParser and my configuration was

org.apache.xerces.parsers.SAXParser = ...
parser.setFeature("http://xml.org/sax/features/namespace-prefixes", true);

I changed to:

org.apache.xerces.parsers.SAXParser = ...
parser.setFeature("http://xml.org/sax/features/namespace-prefixes", false);

and now it works pefectly.

Thanks again @ndw !

relaxng / jing-trang

Why RelaxNG validator reports an error on xmlns attribute? #272