@techreport{R-93-13,
PSURL = {/publications/cgi-bin/tr-fetch.pl?r-93-13+ps},
ABSTRACTURL = {/publications/cgi-bin/tr-fetch.pl?r-93-13+abstr},
ABSTRACT = {AMOS (Active Mediators Object System) is an architecture to model,
locate, search, combine, update, and monitor data in information
systems with many work stations connected using fast communication
networks. The approach is called active mediators, since it introduces
an intermediate level of `mediator' software between data sources and
their use in applications and by users, and since it supports 'active'
database facilities. A central part of AMOS is an Object-Oriented (OO)
query language with OO abstractions and declarative queries. The
language is extensible to allow for easy integration with other
systems. This allows for knowledge, now hidden within application
programs as local data structures, to be extracted and stored in AMOS
modules. A distributed AMOS architecture is being developed where
several AMOS servers communicate, and where queries in a
multi-database language are allowed to refer to several AMOS databases
or other data sources. An overview is made of the architecture and
components of AMOS, with references to ongoing and planned work.This
paper presents an approach to object view management for relational
databases. Such a view mechanism makes it possible for users to
transparently work with data in a relational database as if it was
stored in an object-oriented (OO) database. A query against the object
view is translated to one or several internal queries against the
relational database from which the answer is formed. The object view
can also store its own data and therefore it must be possible to
process queries that combine local data residing in the object view
with data retrieved from the relational database.

Keywords: Object-Oriented Query Processing, Object-Oriented Federated
Databases

(Presented at Next Generation Information Technologies and Systems
(NGITS'93), Haifa, Israel, June 1993.)

},
TITLE = {AMOS - An Architecture for Active Mediators},
AUTHOR = {Gustav Fahl and Tore Risch and Martin Sk{\"o}ld},
EMAIL = {torri@ida.liu.se},
YEAR = {1993},
NUMBER = {R-93-13},
INSTITUTION = ida,
ADDRESS = idaaddr,
IDANR = {LiTH-IDA-R-93-13},
NOTE = {Accepted to Workshop on Next Generation Information Technologies and Systems (NGITS'92), Haifa, Israel, June 1993}