[SOLVED] XSLT error FODC0002 although path seems correct

XSLT error FODC0002 although path seems correct

I am using XSLT 2 (Saxon HE 10.9).

I have the following directory tree:

Project
- index.xml
- Classes
  - MyClassA
    - MyClassA.xml

I am transforming MyClassA.xml into a new file format.

Here a sample code:

<xsl:for-each select="properties/property[type = document('../../index.xml',.)/classes/class/id]">
    <xsl:apply-templates select="display_name"/>
</xsl:for-each>

I'm getting the following error:

FODC0002  Exception thrown by URIResolver resolving `../../index.xml` against
`file:///D:/Project/Classes/MyClassA'. Found while atomizing the second operand of '='

I don't really understand why I'm getting this error, the path seems correct.
The path should be file:///D:/Project/Classes/MyClassA/../../index.xml, which is the same as file:///D:/Project/index.xml, and my file is indeed located here.

What am I doing wrong here?

EDIT: Here is the C# code that transform the file as asked in comments:

RawDestination destination = new RawDestination();
using (FileStream inputStream = File.OpenRead(inputFile))
{
    XsltTransformer transformer = executable.Load();
    using (MessageListener msg = new MessageListener(transformer))
    {
        msg.OnError = () => { success = false; };
        transformer.BaseOutputUri = new Uri(outputFile);
        transformer.SetInputStream(inputStream, new Uri(Path.GetDirectoryName(inputFile)));
        transformer.Run(destination); // this will set HasError if an xsl:message contains "error:"
    }
}

Solution

The code you have to set the base URI of the input stream to the directory of the input file is the culprit i.e. you have

transformer.SetInputStream(inputStream, new Uri(Path.GetDirectoryName(inputFile)));

but need

transformer.SetInputStream(inputStream, new Uri(inputFile));

If you set the base URI to the parent directory and then use a relative URI with ../../ you are ending up in file:/D:/ for your sample data.