Should abbreviations be small caps at the beginning of paragraphs?

http://cl.ly/image/0s2G1u2j3X1t

and

Should plural abbreviations be ALL small caps or just the abbreviation?

http://cl.ly/image/1p2e231I1p1h

I conducting an abbreviation research to see what is best for my production rate regarding glyph names.

Example:
Alternative [alt]
Small Caps [smcp]
Alternative Small Caps [????]
Petite Caps [pcap]
Alternative Petite Caps [????]
Standard Numeral Caps? (cant’t find a better word for it) [????]
Alternative Standard Numeral Caps [????]

What I need is basically a system that makes it easy to add new forms (swash, small caps, old style numerals etc.) with consistent four-letter suffix? So that I can keep true to it.

(I hate to write for example “one.onum_tnum” or “oneonum.tnum” . . .)

If a smart standard exist (that is shared by some developers) -- it would be perfect!

BW,
Kristian