Detailed description of PDF/A generation?

[BjornEricsson1]

Where can I find a dedailed description of what actions is done to a document when "GeneratePDFService/Create PDF" and "Assembler Service" create PDF/A (1-b) documents? The only information from Adobe I have found says that the document is unpacked and fonts are embedded. Other blogs (focusing on signed documents) talk about parts of the document is deleted and other parts are added.  Is there an official detailed documentation?

[mayankg · Accepted solution]

One needs to go through and understand the complete PDF/A1b spec in order to understand the changes done to the regular PDF documents to convert them into PDF/A files.