I'm now proposing to implement it, at least temporarily, as a
degenerate source block (has no body), with interpreter name
'babel'. These 'babel' blocks will use a :srcname header arg to refer
to the source code block that they will use for their body. This
source code block might be in the 'library of babel'. If so it will
use a conventional variable name for its 'main data argument' such as
__data__. Then the babel block (not to be confused with a code block
in the lob) would use :var __data__=ref, where ref is a resource
reference resolved as usual.
This is intended to provide off-the-shelf data plotting and analysis
functions. Current idea is to introduce a new line, perhaps something
like #+babel or #+babel_lib, which will reference (a) some data
and (b) a source block to apply to the data. Code being stolen from
org-babel.el (conceivably some abstraction of some of those functions
could be done to avoid code duplication).
