Saxon

Solution: in CommandLineOptions.applyFileParameters() add code as follows:

                List<XdmNode> nodeList = new ArrayList<>(sourceList.size());
                DocumentBuilder builder = processor.newDocumentBuilder();
          >      if (!"off".equals(getOptionValue("l"))) {
          >          builder.setLineNumbering(true);
          >      }
                for (Source s : sourceList) {
                    nodeList.add(builder.build(s));
                }

But perhaps there are other options we should be setting here as well, e.g. DTD validation.

I'm not sure why I proposed the logic if (!"off".equals(getOptionValue("l"))) which switches line numbering on in the absence of the -l option.

Actually, after writing some tests (commands/QueryTests), I'm not sure why I thought any change was needed. The tests seem to pass with the code "as is". The -l option on the command line affects the default parse options held in the Configuration; these in turn are passed to the DocumentBuilder used to build the parameter documents.