Changes, Consistency and Configuration in Heterogeneous, Distributed Systems
Abstract
The objective of the effort was to develop a unifying framework for change management and automatic change notification suitable for diverse heterogeneous information sources, and to demonstrate that the framework can be realized in a flexible, efficient, and scalable manner. Our results are as follows: (1) We designed and implemented a model for change management in heterogeneous information sources. The model, called DOEM (for Delta-OEM) is based on a simple semistructured object model called OEM developed within the companion DARPA funded Tsimmis project. (2) We developed sophisticated algorithms for detecting changes in semistructured data. Historical information produced by our change detection algorithms is stored in our Lore system (Lightweight Object Repository). Lore is a DBMS suitable for DOEM and OEM data, and was developed in part within the C3 project. (3) We designed and implemented a query language, called Chorel (for Change-Lorel), which is based on Lorel, the query language of Lore. (4) Using our DOEM model, change detection algorithms, and Chorel query language as basic building blocks, we designed and implemented a Query Subscription Service (QSS).
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1999
- Accession Number
- ADA365222
Entities
People
- Jennifer Windom
Organizations
- Stanford University