Representation of PLAM libraries and their contents
The BS2000 Explorer view shows the contents of PLAM libraries as a tree.
The immediate children of the library are type nodes representing the
element types for which library elements exists. The children of a type node
are the library elements of that type. The highest existing versions are
shown as immediate children of their type node.
If multiple versions exist for an element, say hello.c, versions other than the
highest existing are collected in a versions node,
in our example shown as hello.c(). The children of a versions node
are the versioned elements, here shown as hello.c(1) and hello.c(2).
