* Make D-SI XML scheme more similar to DCC XML scheme
* Add upper-level elements to enclose uncertainty types
**Machine-readable versions of the underlying XSD files are online at**
* Change value data types from xsd:double to xsd:decimal
* Improvement of licence (Issue https://gitlab1.ptb.de/d-ptb/d-si/xsd-d-si/-/issues/19)
* D-SI XSD version 2.0.0 @ [https://www.ptb.de/si/v2.0.0/SI_Format.xsd](https://www.ptb.de/si/v2.0.0/SI_Format.xsd)
* Rename real in list (Issue https://gitlab1.ptb.de/d-ptb/d-si/xsd-d-si/-/issues/21)
* Content of distribution elements (https://gitlab1.ptb.de/d-ptb/d-si/xsd-d-si/-/issues/14)
* Latest D-SI XSD version @ [https://www.ptb.de/si/SI_Format.xsd](https://www.ptb.de/si/SI_Format.xsd)
* XSD for D-SI example files [https://www.ptb.de/si/v2.0.0/examples/SI_Format_TestData.xsd](https://www.ptb.de/si/v2.0.0/examples/SI_Format_TestData.xsd)