The Microsoft Business Data Catalog Definition Editor is available in the recent release of the MOSS2007 SDK 1.2
The Business Data Catalog Definition Editor provides a visual tool for creating an Application Definition for the BDC in MOSS 2007. Features include:
Currently, writing an application definition to connect the BDC to a LOB system is a manual process. This requires an understanding of both how the LOB system is configured and what must be included in the XML to satisfy the BDC. Having a tool to simplify this process not only lowers the initial knowledge threshold for administering the BDC, it also lessens the required work of the user (such as testing, making modifications, etc.).
The tool has been designed to assist in the lifecycle management for Application Definition files. The tool enables searching over databases and web service-based repositories, as well as the connection for BDC web parts in MOSS.