Please describe the problem:
I use entities to construct a modular xml file. Specifcally, I write a <book> that is composed of several <chapters>. The main file book.xml uses entities refer to the chapter files (ch1.xml, ch2.xml, etc.). If there is an error in one of the <chapter> files, xmllint (sometimes? always?) reports that the error occurred in book.xml.

Steps to reproduce:
1. Extract all files from the uploaded archive wrong_msg.tar.bz2
2. Run 'xmllint --relaxng docbook.rng main.xml'


Actual results:
3. You will see the following message (and others):
main.xml:5: element para: Relax-NG validity error : Did not expect element para there
4. There is no <para> at line 5 in main.xml. The <para> is at line 5 in file1.xml. By the way, the problem is that the docbook namespace is not declared. I need to write <para xmlns="http://docbook.org/ns/docbook">.

Expected results:
I expect to see:
file1.xml:5: element para: Relax-NG validity error : Did not expect element para there
(etc.)

Does this happen every time?
I think that some errors are reported correctly, and some are not. The example that I have provided, of course, produces the every time.

Other information:
Now that I have reached the end, I realise that there is no way for me to upload the archive. I will submit the bug anyway an dlook for a way to upload the archive.