This paper seeks to document the initial attempt to effect interoperation between a virtual (distributed) union catalogue of bibliographical records and a centralised catalogue of archival collection descriptions. Its specific purpose is to discuss the proposed technical solution and the anticipated usage and usability of the resultant service.
The paper's research subjects were the M25 Consortium's InforM25 union catalogue and the Archives in London and the M25 Area's dual AIM25 databases. The architectural model to effect their interoperation utilised the Z39.50 (information‐retrieval protocol) functionality of the two services plus the latter's separate web application database.
Two core findings are reported. First, that technical interoperability between the Z39.50 elements of the nascent system was successfully achieved. Second, however, that semantic interoperability was significantly impaired by inconsistencies in the interpretation and processing of search types by the two AIM25 databases.
This exploratory research project was concluded in 2003. Since then, what might be termed the next‐generation Z39.50 protocol, Search & Retrieve Web Service (SRW), has been developed. The paper would suggest that the interoperation of InforM25 and AIM25 forms a test‐bed application scenario for SRW.
Regardless of which information‐retrieval protocol is used, a model for controlling semantic interoperability will be an essential requirement. It is recommended that this model be derived from the ISO‐registered Bath Profile.
This paper reiterates the central importance of the need to achieve semantic interoperability in distributed search environments, and should therefore be of interest to those concerned with the funding and creation of any such regional, national or international initiatives.
