specific names of the siglum used on SH

[davidjackson]

It's sometimes left, sometimes right, sometimes down (symmetrical). I call it a cap since I'm not sure what it is yet:

Which is why abstract is the way to go.

If you call it the same thing all the time, you're forcing an interpretation onto it. For all we know, we could be grouping several distinct marks into one.
For example, is an acute accent, an apostrophe and a grave accent the same thing? They look much the same ( ´ ' ` ) but have different functions. It's reasonable to assume the middle mark is related to the other two, but it has a completely different function.

Or, a more extreme example: ( ¨ ) depending where it is, is it an umlaut or a dieresis? Exactly the same mark in the same language but different meanings depending on the associated letter.