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.
Dan Davison
Eric Schulte