Hi Jan,
the ADK files are in a proprieatry format, can only to be read by an SAP System. You have to use the ADK to read the files which is part of NetWeaver.
Theoratically you may read the archive files and export them in a open format (i.e. XML).
But the information contained in the archive files would not be self sufficient. Master and Customizing data is missing. Without this you may not completely interpret the data (i.e. Chart of accounts or Customer Master would be missing). This is the approach SAP offers in SAP Netweaver ILM (System Decommisioning).
But anyhow all solution SAP offers in this context would require a SAP system to interpret the data, which are:
- Archive migration
- SAP Netweaver ILM System decommisioning
- DART extraction
Best Regards
Stefan