This Object Management Group (OMG) GitHub repository contains standard xml data dictionaries supporting the Ground Data Delivery Interface (GDDI) specification located at: https://www.omg.org/spec/GDDI

These dictionaries provide Standard GDDI 'Types' and are individually version-controlled via the and elements contained in each xml file (as explained in the GDDI specification).

This GDDI 'Type' version is also contained in each xml dictionary file name with the format: gddi-standard-typeid---v..xml

Default values for each Tag-Length-Value (TLV) are defined in the 'description' field of each dictionary via the following format: "(Default: )", where the is parsed out by the receiving GDDI endpoint for the applicable TLV.

Any Vendor-specific GDDI data dictionaries are controlled at the vendor's discretion.