Release:

• General Specifications
  
• Usage
  
• XML-Structure
  
• Simple Types
  
• Complex Types
  
• Version changes

These are only snapshots of the development process until official release.
XML-Schema: https://gitlab.com/b2bOptic/lenscatalog/raw/master/b2bOptic_LensCatalog.xsd
PNG of XML-Schema:

Activity of the developementgroup