Issue 545: Differentiate TX8 Grapheme definition
Post by Martin Doerr (17 June 2021)
I think we need to distinguish the set of all possible atomic graphemes of a writing system, from the atomic grapheme, a grapheme sequence (or arrangement) of an actual text, and the grapheme set appearing in an actual text.
Post by Achille Felicetti (10 October 2021)
Our HW for issue 545.
A grapheme is atomic by definition as it represents the minimum unit (i.e., a unit that cannot be further decomposed) of a writing system.
Furthermore, the grapheme is a conceptual and non-concrete unit and is made manifest by the individual act (performance) of writing. For this reason, a grapheme of an actual text cannot exist. Instead, in actual texts we find glyphs that are precisely the physical manifestation of graphemes.
We hope this clarifies :-)
Achille & Francesca
Post by Martin Doerr (10 October 2021)
Dear Achille, dear Francesca,
My apologies for using "grapheme" for "glyph" and "grapheme". I understand the difference
You write: "A grapheme is atomic by definition as it represents the minimum unit (i.e., a unit that cannot be further decomposed) of a writing system."
I agree, but you define:
Subclass of: E90 Symbolic Object
Scope Note: Subclass E90 Symbolic Object used to represent the abstract units with distinctive value in a given writing system. A grapheme is a character or sequence of characters [MD1] that functions as a distinct unit within an orthography. It
"The reading activity, thus, is intended as a specific observation (S4) in which the decoding of the signs is performed, i.e. the linguistic value is recognised and the message is understood. Cases in which decoding does not happen (e.g., the observer is able to describe the signs but not to assign a specific linguist value to them), the S4 class could be used as it is..."
I further miss a property implementing the glyph-grapheme association.
If we interpret a text in symbolic form as a sequence of grapheme occurrences in the symbolic text, we may need another property of which graphemes occurred. I would like to have your expert opinion, if a Writing system used for a Written Text is different from that used for a symbolic text (IsA Expression).
I hope this makes my concerns more clear
All the best,
Post by Achille Felicceti (12 October 2021)
We understand your doubts and we believe they make perfect sense.
In fact, re-reading the scope notes of the classes that you mention, we realised that their definitions are a bit confused and incoherent with each other and with the concepts we have in mind, probably due to the different revisions made to the model along its various versions, and should certainly be revised and possibly better harmonised.
It will be a pleasure to discuss it with tomorrow and in the next meetings, virtual or preferably face to face :-)
Achille & Francesca