SiSU 5.6.7

SiSU 5.6.6

* (i) auto naming attempts to extract a suitable numeric name from document
  headings if available, at times one appears to be available but is re-used
  elsewhere in the document, (as where the document has Parts or Sections and
  naming starts again within these sections from 1); (ii) this is treated as an
  exception and an alternative sequential naming scheme is triggered; (iii) if a
  document heading does not provide a suitable numeric name, another sequential
  scheme is used

* adjustment to (existing) provided feedback, based on:
  * level A~ title, required;
  * levels B~ C~ D~ optional sequential document divider headings
    (Part, Section etc. equivalent);
  * level 1~ required, heading level preceding substantive text; followed by
  * levels 2~ 3~ 4~ optional, sequential headings
    (1.1, 1.1.1, 1.1.1.1 equivalents)