In particular define more precisely what are the SPARK global contracts
and specify which errors can be found (and how) during the different
phases of the project (software requirements development, etc.).
advanced in group on
- inputs/outputs of system processes, in the synthesis table; to move to the sections
- information in the software development processes
Context part, scheme, and 1st activity have been reviewed and improved => next step consists in continuing description of the other activities in the same way.
added a synthesis table for system definition to cover all activities and the error classes they introduce, to clarify
need to add in each chapter
- inputs/outputs of each activity
- details of each activity
- complete the error classes of each activity from the synthesis table
synthesis table to remove from document when activities descriptions are complete.
Root type System.Dim.Mks is of type Long_Long_Float which is not
supported in SPARK, on systems where this is a larger type than the
IEEE-754 64bits floats. Redefine a local version of Mks package to
use Long_Float as a root type instead.
Some units in types.ads are defined as floating-point types and others
as signed integer types. Start using the dimension system in GNAT on
floating-point units. Next step is to see if there is a benefit in using
floating-point types instead of signed integer types for the input and
output types, so that we can use the standard dimension system. Otherwise,
we could use a signed integer type with the Dimension_System aspect as
the root type for all these signed integer types.
Description of the architecture at multi-system level (layer 0).
Description of the incremental approach to architecture development.
Fail-safe design rationale, considerations on fault tolerance and development assurance.
