However, the problems of heterogeneous data, scale, and non-traditional discourse types reflected in the text, along with the fact that search engines will increasingly be integrated components of complex information management processes, not just stand-alone systems, will require new kinds of system responses to a query.
32.
INDUS employs ontologies and inter-ontology mappings, to enable a user or an application to view a collection of physically distributed, autonomous, semantically heterogeneous data sources ( regardless of location, internal structure and query interfaces ) as though they were a collection of tables structured according to an ontology supplied by the user.
33.
This approach is simple and modular, but has the disadvantage that the model itself can be expensive to store, and also that it forces using a single model for all data being compressed, and so performs poorly on files that contain heterogeneous data . " Adaptive " models dynamically update the model as the data is compressed.
34.
Hearth Tax Online does not provide users in the manner of new-style prosopographies which are often favoured in dealing with pre-modern lists of names with access to a database with the capacity to sort heterogeneous data, in which factoids related to names are presented on the web without electronic access to the original texts from which the information has been drawn.
