CASE tool functionality is only available in ArcEditor and ArcInfo. Relationships and geometric networks are read-only in ArcView (Float and Single Use).
The Microsoft Repository is no longer supported by Visio 2002. Instead UML models can be exported as XML files using the XMI Export download. The upgraded CASE Tools support the generation of schema and code from models stored in XMI.
The ESRI XMI Export.vsl file is a replacement for the VisioUmlAddon.vsl file. The VisioUmlAddon.vsl file has a dependency on Developer Studio. The ESRI XMI Export.vsl file removes this dependency.
Important: a file called uml.dtd must be present in the directory that contains the XMI files (the file may be empty). This file is located in the ArcGIS installation folder ...\CaseTools\Utilities folder.