The naming scheme for datasets consists of three parts:
See Figure 1 above. Type is the top tier in ADDE's hierarchical naming scheme. Image, grid and point indicate the type of data in the dataset files. McIDAS area files are image data; McIDAS grid files are grid data; McIDAS MD files are point data.
Group is the next tier in the naming scheme. A group name can be used only once under each type. The group tier in Figure 1 has three groups named RT. Notice that RT is used only once under each type.
Descriptors are the bottom tier in the naming scheme. Descriptors are not data files; they are names that point to datasets. Identical descriptors under different groups can point to the same or different datasets.
Since each ADDE command that accesses data works only with a single type, you don't have to specify the type in the command entry. For example, the command IMGDISP does not have a parameter or keyword for type because it limits its search to datasets of type IMAGE. The following command displays the most recent image in the dataset named RTIMAGES/GE-IR on frame 1, centered on St. Louis, Missouri.