Step 1: Identify UKOLN and the model.
UKOLN was a center of expertise in digital information management, based at the University of Bath in the UK. The "Analytical Model of Collections and their Catalogues" was part of their work in organizing the emerging world of digital resources.
Step 2: Recall the specific publication.
This model was described in a paper by Paul Dempsey of UKOLN. The key work defining this model was developed and published around 1998. It was part of a broader effort during the late 1990s to create logical frameworks for the growing number of online collections.
Step 3: Conclude based on historical context.
The late 1990s was a period of intense activity in defining standards and models for digital libraries. 1998 aligns with the timeframe for this kind of foundational work from an organization like UKOLN.