I know the iSpec2200 and S1000D are the specifications which are used in the aircraft maintenance manual, I have to know how they actually work in the aviation domain and what is the difference between them.
I've only worked with S1000D, but what I understand is that they share a common origin in ATA Spec100, with some differences being:
- maintains a focus on "legacy", monolithic publications
- scope is more limited to aircraft
- specification costs money (https://publications.airlines.org/CommerceProductDetail.aspx?Product=274)
- focuses on modular data, with concepts such as data modules and the CSDB
- scope is more generalized to any product (air, land, sea, etc.)
- specification is free (http://public.s1000d.org/Downloads/Pages/S1000DDownloads.aspx)
S1000D is the successor of iSpec 2200 since 2012. The standard is now free of charge and can be easily downloaded from S1000D website.