Draft PR with multiple changes

[leonid-s-usov]

Hi,

found your fork as the only one actually contributing to the project.
I have this local branch where I had to add a number of features which I believe can be useful to others.

Let's see if this makes sense. I don't have too much time but probably can refactor things if it will be needed

The major changes here are

• Preserving the order of the encode calls in the output XML
• Compliant approach to treating empty elements. Such elements should return value "". The only standard way to have an element read as nil is to utilise the xsi:nil="true" attribute.

[MaxDesiatov]

Hi @leonid-s-usov, I see this has commits from XMLCoder, was this actually meant to be a PR in that repository?

[regexident]

Given …

found your fork as the only one actually contributing to the project.

… OP probably meant XMLCoder, yeah. 🤔