CONTENTdm® uses a proprietary, purpose-built, non-relational database for persistence of all metadata, collection data, and indexes. There is no OCLC-approved way of accessing this database directly. Object files themselves are not stored in the database and instead are stored as-is inside a managed folder structure. As of version 2.1, dmBridge accesses thumbnail images and object files directly from the filesystem, without going through CONTENTdm®.
All CONTENTdm® objects have a thumbnail image, which is a highly compressed JPEG image constrained to 160 pixels on a side. A thumbnail image can be accessed in a typical installation at the following URI:
The file of a CONTENTdm® object can be accessed at the following URI:
This includes full-sized images, for objects that have one.
For image-based objects, a cropped image tile can be downloaded at the following URI:
These tiles are generated on-the-fly.