A client application can request that the application server provide data packets that are coded in XML instead of OleVariants. By combining XML-coded data packets, special javascript libraries of database functions, and the Web server application support, you can create thin client applications that can be accessed using a Web browser that supports javascript. This combination of features is called InternetExpress. 

Before building an InternetExpress application, you should understand the Web server application architecture and the multi-tiered database architecture. These are described in Creating Internet Server Applications and Creating multi-tiered Applications 

An InternetExpress application extends the basic Web server application architecture to act as the client of an application server. InternetExpress applications generate HTML pages that contain a mixture of HTML, XML, and javascript. The HTML governs the layout and appearance of the pages seen by end users in their browsers. The XML encodes the data packets and delta packets that represent database information. The javascript allows the HTML controls to interpret and manipulate the data in these XML data packets on the client machine. 

If the InternetExpress application uses DCOM to connect to the application server, you must take additional steps to ensure that the application server grants access and launch permissions to its clients.