... In this article we describe how the GLU system (Uniform Link Generator) allows the Aladin browsing tool to integrate several image and data servers through a single interface. ... How to access the data servers? ... The GLU system is a distributed repository of Web server descriptions. ... With these GLU records, Aladin dynamically builds the server access forms, using the description of each required parameter, their default values, the data type assigned to each of them and so on; . ...