Reference Scheme for Mongolian Rendering

Looking at Greg's list of data sets (DS...) in his post of Saturday 8th
August ('Mongolian Variation Sequences Missing from Unicode 8.00 Code
Chart',
http://lists.w3.org/Archives/Public/public-i18n-mongolian/2015JulSep/0248.html
), we are missing two important items:

1) A reference scheme for rendering.  I offer one in the attachment
rendering_framework.odt.

2) The rules for contextual forms that may be overridden by variation
selectors.  Without these rules, we do not know whether we have an
adequate set of variation selectors for rendering connected text.

I am trying to identify the contextual rules, though I am not the best
person for the job.  NNBSP has me worried.  Do we need to identify
suffix rules for every language that might conceivably be written in
the Mongolian script with separated suffixes?

Richard.