Digilib consists of the Scaler service and the Digilib Client.
The Digilib Scaler Service
The Digilib Scaler service is a webservice running on a TextGrid server that receives commands from the Digilib Client in the TextGrid Lab and communicates with the TextGrid Repository. The Digilib Client tells the service which image to display and which image operations to perform and the Digilib Scaler service returns the requested image.
The Digilib TextGrid Client
The Digilib TextGrid Client is a plugin module for the TextGrid Lab that lets the user display, modify, and annotate images. The Client communicates with the Digilib Scaler service.