Service

ACM Transactions on Database Systems -- editor

Journal URL,

ACM Transactions on Internet Technology -- editor

Journal URL,

Information Systems -- editor

Journal URL,

VLDB Journal: Special issue on Uncertain and Probabilistic Databases -- guest editor (with Peter Haas)

Journal URL,

Data Engineering Bulletin: Special Issue on Data Provenance -- Guest editor (with Peter Buneman)

Journal URL,

Data Engineering Bulletin: Special Issue on Web-Scale Data, Systems, and Semantics -- Guest editor

Journal URL,

Data Engineering Bulletin: Special Issue on Probabilistic Data Management -- Guest editor (with Minos Garofalakis)

Journal URL,

PODS 2008 -- PC Member

The official link,

11th International Conference on Database Theory -- co-PC Chair (with Thomas Schwentick)

The official link,

VLDB 2007 - PC member

The official link,

SIGMOD 2007 -- PC Member

The official link,

VLDB 2006 - PC member

The official link,

SIGMOD 2006 -- PC Member

The official link,

VLDB 2005 - PC member

The official link,

ICDE 2005 - PC member

The official link,

The 14th International World Wide Web Conference (WWW2005) - Vice Chair for the XML and Web Services Track

The official link,

The First Information Security Practice and Experience Conference (ISPEC 2005) -- PC member

The official link,

Workshop on the Integration of Information Retrieval and Databases -- PC member

The official link,

3rd XML and Information Retrieval Workshop at ACM SIGIR 2004 -- PC member

The official link,

Dagstuhl Seminar on Foundations of Semistructured Data -- co-organizer

The official link,

XSym 2004 - coPC chair

The official link,

PODS 2004 -- PC chair

Conference Website, DBLP link,

PLANX 2004

Workshop URL,

DBPL 2003 -- co-PC chair (with Georg Lausen)

Conference URL,

SPIRE 2003

Conference URL,

VLDB 2003 -- PC member

PODS 2003 -- PC member

Conference URL,

PLANX 2002 -- PC member

Workshop URL,

VLDB 2002 -- PC member

Conference URL,

PODS 2002 -- PC member

Conference URL,

SIGMOD 2001 -- PC member

Conference URL,

WWW10 -- Deputy Vice Chair for Searching, Querying, and Indexing

Conference URL,

ICDE'2001 -- Vice Chair

Conference URL,

CIKM'2000 -- PC member

Conference URL,

ICDT'2001 -- PC member

Conference URL,

WebDB 2000 -- co-PC Chair

Joint with Gottfried Vossen, Workshop URL,

Data Processing on the Web: A Look into the Future - co-organizer

Home Page,

Electronic Commerce and Web Technologies (EC-Web 2000) -- PC member

Home Page,

Member of the EDBT'2000 Program Committee

The EDBT99 Home Page,

International Workshop on Database Programming Languages (Kinloch Rannoch, Scotland, 1999) -- PC member

Call for Papers,

Member of the ICDT'99 Program Committee

The ICDT99 Home Page,

Workshop on Query Processing for Semistructured Data and Non-Standard Data Formats (Jerusalem, Israel, 1999)

The Workshop's Home Page,

Workshop on Web Information and Data Management (Kansas City, Missouri, 1999) -- PC member

The WIDM'99 Home Page,

Guest Editor for INFORMATION SYSTEM's Special Issue on Semistructured Data (23(8), pp. 517, 1998)

Joint work with Gottfried Vossen, Announcement and Call for Papers,

Member of the PODS'98 Program Committee

The PODS/SIGMOD'98 Home Page,

Workshop on Web Information and Data Management (Washington DC, 1998) -- PC member

The WIDM'98 Home Page,

International Workshop on Internet Data Management (Florence, Italy, 1999) -- PC member

The IDM'99 Home Page,

Guest Editor for SIGMOD Record's special section on Semistructured Data (December 1997)

Foreword, SIGMOD Record's home page,

Workshop on Management for Semistructured Data (Tucson, AZ, 1997) --- PC member

All papers, Notes from the panels,