Hi,<BR><BR>I am writing a thesis on Federated Database Systems and I am looking for some good resources for my studies. For those not totally familiar with the subject: Federated Databases are basically online databases that communicate with each other through one interface. I am trying to build a site that is able to read and modify information that resides in different online databases. Does anybody have some tips for good sites/resources that covers this subject?<BR><BR>How can I trigger multiple local queries on multiple online databases from one location (site/interface)?<BR>Is there a standard protocol for accessing online databases?<BR><BR>Any help is appreciated. You can also mail me at: webmaster@lordotrings.com<BR><BR>Philip Kooijman<BR>