Sequence design in pypulseqpp

The abstractions the package places above the flat block list of Pulseq representation: a reusable block layout whose timing and gradient waveforms are solved once, an application that adds a prescription, a sampling order and a scan loop, and the sampling routines that feed it. None of them is part of the file format; a sequence written through them is an ordinary .seq file.

Concept	What it covers
Sequence modules	What a module publishes, the center reference its timing is measured from, and what excitation, preparation and readout modules are each responsible for.
Sequence applications	How a prescription becomes a sampling order and a repetition kernel, and how encoding labels and a prescan chain are written.
Sampling support and ordering	Acquired support and temporal ordering, the kinds of value the sampling routines exchange, and where encoding labels are created.