A key function to enterprise portals is the ability to participate in a workflow process. Business processes across enterprises can function in an integrated manner with the help of business integration servers that broker information across multiple loosely-coupled applications. A business integration server maintains workflow process definitions and routes business documents via a messaging infrastructure. In this scenario, the portal works as a workflow client handling messages as they arrive and supporting process managers. This paper describes a portal prototype implementation that is supported by an open service platform and by a framework that extend the portal capabilities with metadata and workflow management. © 2003 by Springer Science+Business Media New York.105 615630Aalst, W., Hofstede, A., Kiepuszewski, B., Barros, A., (2000) Workflow Patterns, , http://tmitwww.tm.tue.nl/research/patterns/, URLBoldt, J., (2000) Workflow Management Specification, , http://www.omg.org/cgi-bin/doc?formal/00-05-02, ver. 1.2, OMG doc, URLBoldt, J., (2002) Meta Object Facility Specification, , http://www.omg.org/cgi-bin/doc?formal/02-04-03, ver. 1.4, OMG doc, URLChapman, M., (1995) Overall Concepts and Principles of TINA, , http://www.tinac.com/specifications/documents/overall.pdf, TINA consortium, URL(2000) DMOF Tool User's Guide, , http://www.dstc.edu.au/Downloads/CORBA/MOF/dMOFlI.UserGuide.pdf, DSTC, release 1.1, DSTC, Brisbane, AustralyEckert, K., Komer, E., Schoo, P., (2001) Introduction to Middleware Platform, , http://www.enago.de/, doc. Ver. 1.0Gamma, E., Helm, R., Johnson, R.E., Vlissides, J., (2001) Design Patterns- Elements of Reusable Object-Oriented Software, , Addison Wesley, julyHagen, C.J., (1999) A Generic Kernel For Reliable Process Support, , PhD thesis, Swiss Federal Institute of Technology, ZUrich, Switzerlandhttp://www.int:ethz.ch/department/IS/iks/publicationslfilesldisshagen.pdfHeaton, L., (1999) COREA 2.3- Interface Repository, , OMG dochttp://www.omg.org/cgibin!doc?formal/99-07-14Heaton, L., (2001) Unified Model Language Specification, , http://www.omg.org/cgi-bin/doc?formal/01-09-71I80, ver. 1.4, OMG doc, URLHeaton, L., (2002) UML Profile For Enterprise Distributed Object Computing, , http://www.omg.org/cgi-bin/doc?ptc/02-02-05, URLIannella, R., (2002) Mostly Metadata: A Bit Smarter Technology, , University of Queenslandhttp://www.dstc.edu.au!RDU!publicationslmvala98!(2001) Enago, OSP Version 0.9 Introduction, , http://www.enago.de!, IKV, version 0.9.02, Draft April, IKV URLJablonski, S., Bussler, C., (1996) Workflow Management-Modeling Concepts, Architecture and Implementation, , International Thomson Computer PreessManolesco, D., (2001) Micro-Workflow: A Workflow Architecture Supporting Compositional Object-oriented Software Development, , PhD thesis, University of Illinois, USAManolescu, D., Johnson, R., (1998) Patterns of Workflow Management Facility, , http://citeseer.nj.nec.com/manolescu98patterns.htmlWarne, J., (1998) Norte/ Revised Submission to The Workflow Management, , http://www.omg.org/cgi-bin/doc?bom/97-08-04, URL(1999) Terminology & Glossary, p. 8. , WfMC, standard number TC 1011http://www.wfmc.org/standards/docs/TC-1011termglossaryv3.pdfWiseth, K., (1991) Portal PowerOracle MagazineNovember, 1999, , http://www.oracle.com/oramag/oracle/99-nov!69ep.html, last visit June 2000 URLWesker, M., (2001) Using a Portal to Solve Business Problems, pp. 54-55. , KMWorld magazine, july/augustDavies-Carr, H., (2002) Next Generation Portals, , http://www.client-information.com/bealPDF/ukportal.pdf, BEA Web Logic presentation, URL