Just to document how I do this:

Problem: I need a schema for FooTask

Solution:

• Create a ‘tests’ directory.
• populate said directory with simple example xml files.
• Name those files valid-foo.xml or invalid-bar.xml (I use numbers for foo and bar).
• Create your xsd file in the same directory as ‘tests’. Lets call it foo.xsd
• Copy the following Makefile into the same location.

[cc lang=”bash”] XSD=foo.xsd

run xmlstarlet with -e to see verbose error.

test:

@for file in `ls -1 tests/valid*.xml`; do if xmlstarlet val -q --xsd ${XSD} $${file}; then echo "pass"; else echo "fail: $${file}"; fi; done
@for file in `ls -1 tests/invalid*.xml`; do if ! xmlstarlet val -q --xsd ${XSD} $${file}; then echo "pass"; else echo "fail: $${file}"; fi; done

[/cc]

Now, run make, and if anything fails you can manually run xmlstarlet val -e --xsd foo.xsh [failing file.xml] to see the details.