Fix #87 validation of external instances

[rhunwicks]

No description provided.

[ukanga]

Looks okay, any chance you can add a test for this?

[rhunwicks]

I have added run_odk_validate=True to the existing tests, which causes them to fail against master. Then I have updated them to match the slightly altered XML output (with the included _) such that they pass in this branch.

[MartijnR]

Thanks @rhunwicks. This is great.

External instances have been accepted by the ODK community recently, so hopefully after a future ODK Validate update, we should be able to remove the trick (the complete dummy instance content) that fools it into validating.

[rhunwicks]

@MartijnR please can you point me to the discussion about accepting external instances - I want to use select_one_from_file with Kobocat and there are some changes to Kobocat that would be required?

[dorey]

@rhunwicks, in one of the kobocat py files (I can't look it up right now) there's a method imported called from pyxform import survey_from. If you comment out this import , then you can switch kobocat's pyxform to this one, and only lose spss features. We are working on a fix to kobocat's pyxform situation that should be pushed in the next week, at which point select_one_from_file will be supported.

[MartijnR]

Excellent news @dorey (probably also activates pulldata())

@rhunwicks the discussion I was referring to in order to in the future clean up the pyxform code by removing th dummy instance content was an XForms Spec discussion.