To enable the structure to be defined at runtime, an empty dynamic structure variable must be declared at compile time, using the type DYNSTRUCT:
MAP1 ds, dynstruct ! scalar dynamic structure
MAP1 DS2, DYNSTRUCT ! another
As with other built-in types, the type name is case insensitive.
Dynstructs are similar to dynamic X variables (X,0), except that they may be associated with—i.e. bound to—a structure definition. Until then, the structure is considered "uninitialized". Once the dynstruct variable has been bound to a defined structure, it behaves like a fixed-length instance of that structure. See Reference / Usage.
