Dear Chrstian, Thank you for your answer. I'm going to post the question in [2]. In the meanwhile, I did some other tests, whose results seems very strange to me. I run the following xquery on the same xml file generated by the example attached in the first email (here reported) : let $mydoc := <main xmlns:xi="http://www.w3.org/2001/XInclude"> <level1 xml:base="./include1/include1.xml"> <level2 xml:base="./include1/include2/include2.xml"> <level3 xml:base="./include2/include3/include3.xml"> <level4 xml:base="./include3/include4/include4.xml"> <data>0</data> <data>1</data> </level4> <level4b> <data>0b</data> <data>1b</data> </level4b> <data>2</data> <data>3</data> </level3> </level2> </level1> </main> return base-uri($mydoc//level3) The result returned by function base-uri is: file:///C:/software/test_include/include1/include1/include2/include2/include3/include3.xml which I think is wrong, I think it should be: file:///C:/software/test_include/include1/include2/include3/include3.xml -----Original Message----- From: Christian Grün <christian.gruen@gmail.com> Sent: Saturday, July 28, 2018 2:57 PM To: Marco Randazzo <Marco.Randazzo@iit.it> Cc: BaseX <basex-talk@mailman.uni-konstanz.de> Subject: Re: [basex-talk] about xml:base when using multiple nested xi:include Hi Marco, In BaseX, there’s just a little line of code that enables or disables XInclude [1]. If no one else reacts to your question, maybe people on a generic XML mailing lists (such as [2]) can give you better feedback on this. Ciao Christian [1] https://github.com/BaseXdb/basex/blob/master/basex-core/src/main/java/org/ba... [2] http://www.xml.org/xml-dev/ On Fri, Jul 27, 2018 at 2:21 PM Marco Randazzo <Marco.Randazzo@iit.it> wrote:

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