Dear all,
My example (in attachment) employs xi:include elements to include other xml files.
The example is constituted by a main.xml file which includes another file (include1.xml) stored in a subfolder, called include1.

include1.xml, in turn, includes another xml file (include2.xml) stored in a subfolder of include1 which is called include2.

Overall, the example consists of four folder levels and only the last file, include4.xml, contains data.

When I import main.xml in baseX, I obtain the following result:

<main xmlns:xi="http://www.w3.org/2001/XInclude">

  <level1 xml:base="./include1/include1.xml">

    <level2 xml:base="./include1/include2/include2.xml">

      <level3 xml:base="./include2/include3/include3.xml">

        <level4 xml:base="./include3/include4/include4.xml">

<data>0</data>

          <data>1</data>

        </level4>

</level3>

    </level2>

  </level1>

</main>

The xml tree is correct, but I have doubts about the value of the attribute xml:base.
In particular:

- level1: I think that the value of xml:base  ( i.e. ./include1/include1.xml) is correct.

- level2: xml:base  value is correct if its meaning is a path relative to the root file. Otherwise, if xml:base is supposed to store a path relative to the current file, then it should be  ./include2/include2.xml.

- level3: This seems to be not correct, neither as an absolute path, nor as a relative path. I think it should be  ./include1/include2/include3/include3.xml as a path relative to the root file or ./include3/include3.xml as a path relative to the current file.

- level4: Same as level3.

What do you think? Am I missing something? What are the specifications for the value of xml:base?
Thank you,
Marco Randazzo