Ammended error message and added strict option.

[grootstebozewolf]

Added strict option to check for typeNames, this is option is mandatory and checked for a correct error handleing in the GDI-DE testsuite validation.

[jesseeichar]

@fxprunayre @Delawen How does this look to you guys now? I think Jeroen has tried to respond to all of your comments. Can we merge this?

[jesseeichar]

Should we merge this after the release?

[jesseeichar]

This is related to #956

[fxprunayre]

Sounds good even if I'm not sure about adding empty elements to make XML valid in some cases for passing tests is really required #956 (comment). But as said to Jeroen yesterday, not sure those outputs formats are used a lot in the real - in most cases DC or ISO full is used.

@grootstebozewolf you can add commits in an existing PR and push again, the PR will be updated. No need to create a new one each time.

Could go in 3.0.0 probably if needed I think.

[Delawen]

Previous PR had many things that should have been kept private, I think that's why he created a new one. Going to check changes now...

[Delawen]

Looks much better now. I don't see why we can't add it to 3.0.0. But @fxprunayre is the one who is leading the version, he should be the one with the last word in my opinion.