The digital Syriac Galen Palimpsest (SGP) data set is an archive built on the model of the digital Archimedes Palimpsest. As with Archimedes, the SGP data set is meant to promote the long-term preservation of and access to the digitized palimpsest. The SGP data set follows archiving best practices and uses the Archimedes Palimpsest Metadata Standard for spectral imaging metadata. The data is released under a Creative Commons Attribution 3.0 Unported license (CC BY 3.0). The SGP project used custom software to manage its data and metadata from the time of capture to final data set publication. In the years since initial publication, newly discovered leaves of the manuscript have been discovered, imaged, and added to the on-line archive. Since the publication of the SGP data set, subsequent projects have built on and refined the methods established by the SGP team by moving away from content-based file naming, establishing formal quality assurance practices, increasing automation in the creation and management of data and metadata, and including full bit-depth capture images in the digital product.