> For the complete documentation index, see [llms.txt](https://docs.wellcomecollection.org/archivematica/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.wellcomecollection.org/archivematica/high-level-design.md).

# High-level design

Archivists upload packages containing born-digital files to an S3 bucket (the "transfer source bucket").

These packages are then processed by Archivematica. It does various processing steps and analysis, and creates [a METS file](https://en.wikipedia.org/wiki/Metadata_Encoding_and_Transmission_Standard) which describes the contents of the archive. The files and the metadata get packaged in a BagIt bag, which is uploaded to the Wellcome storage service for permanent storage.

Successfully stored archives are then sent to iiif-builder, which uses the METS file to construct a IIIF Presentation manifest to describe this archive. (If we can make the archive publicly available.)