Traditional technical information is structured in a paper-based manual (volumes chapters, sections, work packages, etc.). S1000D, however, is typically structured to represent the physical or functional (or both) breakdown of the systems, subsystems, sub-subsystems, equipment, assemblies, and components (called "The Product") of the project. Hence, the conversion process isn't as easy as just converting to SGML/XML. The data actually has to be "busted up" into more granular chunks of information that adhere to the internationally approved data structure.
We have carried out significant work to map the data elements of the various legacy systems to those of S1000D. We have found that, with few exceptions, S1000D can indeed capture all the data that resides in those legacy systems. Where an exception is found, a change request is submitted to the S1000D committee (Technical Publication Support Maintenance Group (TPSMG)) to help S1000D adapt to meet all the needs of the legacy systems.
To date, we are able to provide conversion to S1000D from such legacy systems as;