DOI (Databases and Operational Intelligence) is a research group at Department of Computer Science COMSATS University Islamabad, Lahore Campus, Pakistan. DOI is involved in research on a broad range of topics in Databases and Information Systems such as Data Warehousing, Data Mining, Web Mining, Text Mining, Knowledge Management, Repository Management, Competency Management, Operational Intelligence Management and Workflow Management Systems. DOI is an innovative research group at COMSATS University Islamabad, Lahore Campus . This group is currently addressing various research issues in Repository Management, Business Intelligence, Knowledge Management, and Operational Intelligence such as Repository Management of Manual Documents, Knowledge Integration in Recognition of Optical Character (KROC), Integrating Business Intelligence for Operational Intelligence, Schema Based Transformation of Text Document into Data Warehouse, Data Integration, Web Data Sources, Query Optimization, Semi-Structured Data (XML, RDF), Distributed XQuery and SPARQL and Data Services and Service Oriented Data Integration etc.