API: token component locations

[ruv]

Recognizer v4 API calls the entity "parsed data" that is called "token" here. And it doesn't specify where these data pieces may be located.

Token is a tuple of data objects (of the known data types). In general, the data objects can be located not only in the data stack or in the floating-point stack, but also in the memory.

An excerpt from the 3.1 Data types section:

A data type identifies the set of permissible values for a data object. It is not a property of a particular storage location or position on a stack. Moving a data object shall not affect its type.

If a program provides all required actions to work with a token, nothing prevents a program to use other locations beyond the standard stacks. So, some components of the token can be located, for example, in some user-defined stack.

But it is not compatible with some methods to create a token descriptor (see #10). And also, THROW will not discard the components beyond the standard stacks.

So, the question is: should the location of token components be tied to the standard stacks only?

If it should, — we have more approaches to create descriptors and handling tokens.

At the moment I think, it should.
Or can anybody provide a useful use-case for the loosely case?