integration on data and information level, structural integration, semantic integration
principal approaches (database-centric), manual integration, common user interface, integration by applications, workflow management system (WFMS), business processes where each single step is executed by a different application or user, modeling, execution, and maintenance of processes that are comprised of interactions between applications and human users, integration by middleware, uniform data access, mediated query systems, provides single point for read-only querying access, sends subqueries to data sources, combines returned query results, portals, personalized doorway to the internet / intranet, federated database system (FDBMS), supports global queries / transactions / access control, fully-fledged DBMS (implement their own data model), integration-by-webservices, integration through software components that support machine-to-machine interaction over a network by XML-based messages that are conveyed by internet protocols, peer-to-peer integration, decentralized integration between distributed, autonomous peers, every data source needs to only provide semantic mappings to a set of neighbors it selects, and more complex integrations emerge as the system follows semantic paths in the network., with a P2P architecture there is never a single global mediated schema, since data sharing occurs in local neighborhoods of the network, common data storage, date warehouse (DWH), OLTP (online transaction processing) operational source systems, data is extracted, transformed and loaded (ETL) into a warehouse, OLAP (online analytical processing) can be performed on integrated and aggregated data, operational data stores, warehouse with "fresh" data, updates in data sources are propagated to data store, no data cleansing / aggregation / historisation
integration on the level of application logic
querying / reporting on business activities
Online Analytical Processing (OLAP)
data mining, forecasting, dicision making, enterprise-wide planning, gain sustainable competitive advantages
integrated information on individual customers
business environemnt trends
integrated company information as personalized web sites
single access points for employees / customers / partners / public
enables and facilitates business transactions over computer networks
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