Minor fix for Combined NDM output to KVN

Added proper error message to Combined NDM output to KVN.

Upgrade to new xsdata and bugfixes

Version 2.1 (2021/05/16)
- Updated to new xsdata and lxml
- Fixed an issue (due to new xsdata) where root tags could not be processed correctly

Version 2.0

This version adds KVN read / write support. Therefore all NDM files in KVN or XML formats are supported.

Improved NDM Combined Instantiation Handling

Started stripping single data Combined Instantiation NDM files

Version with Combined Instantiation Support

Added support for Combined Instantiation NDM Files

Updated internal structure

While no new functionality has been added, the project internal structure has been checked to solve problems with packaging and, specifically, flit.

Release

This is the release with full functionality (read and write NDM XMLs through auto-generated object-trees)

Release 1.0 Alpha

Full functionality, may require some additional testing.