%**%                    Multiply/join row records into block records.
%//%                    Factor-out (aggregate/project) block records
                        into row records.
blocks_to_rowrecs       Map sets rows to columns (takes a
                        'data.frame').
blocks_to_rowrecs_spec
                        Create a block records to row records transform
                        specification.
build_pivot_control     Build a blocks_to_rowrecs()/rowrecs_to_blocks()
                        control table that specifies a pivot from a
                        'data.frame'.
build_unpivot_control   Build a rowrecs_to_blocks() control table that
                        specifies a un-pivot (or "shred").
cdata                   'cdata': Fluid Data Transformations.
convert_records         General transform from arbitrary record shape
                        to arbitrary record shape.
layout_by               Use transform spec to layout data.
layout_by.blocks_to_rowrecs_spec
                        Use transform spec to layout data.
layout_by.rowrecs_to_blocks_spec
                        Use transform spec to layout data.
map_fields              Map field values from one column into new
                        derived columns (takes a 'data.frame').
map_fields_q            Map field values from one column into new
                        derived columns (query based, takes name of
                        table).
pivot_to_rowrecs        Move values from rows to columns (pivot).
rowrecs_to_blocks       Map a set of columns to rows (takes a
                        'data.frame').
rowrecs_to_blocks_spec
                        Create a row records to block records transform
                        specification.
run_cdata_tests         Run cdata package tests.
unpivot_to_blocks       Move values from columns to rows (anti-pivot,
                        or "shred").
