U+2981 "⦁" Z Notation Spot Unicode Character
Unicode Version 17.0
⦁
U+2981 “⦁” Z Notation Spot is a small, filled circular symbol used primarily in formal methods, specifically within the Z notation, a formal specification language for software and systems engineering. In this context, the spot often serves as a marker or placeholder within mathematical expressions and set-based definitions, helping to denote a specific position or element in a structured way. Beyond its technical roots, the glyph appears in mathematical and symbolic notations where a compact visual focus point is needed, though its use remains niche compared to more common punctuation marks or geometric shapes.
General Properties
| Code Point | U+2981 |
| Version Added | 3.2 |
| Name | Z Notation Spot |
| Block | Miscellaneous Mathematical Symbols-B |
| General Category | Math Symbol |
| Canonical Combining Class | Not Reordered |
| Bidirectional Class | Other Neutral |
Encodings
| HTML Decimal Encoding | ⦁ |
| HTML Hex Encoding | ⦁ |
| UTF-8 Encoding | 0xE2 0xA6 0x81 |
| UTF-16 Encoding | 0x2981 |
| UTF-32 Encoding | 0x00002981 |
| C/C++/Java Escape | \u2981 |
Unicode Properties
| NFC Quick Check | Yes |
| NFD Quick Check | Yes |
| NFKC Quick Check | Yes |
| NFKD Quick Check | Yes |
| Numeric Type | None |
| Numeric Value | NaN |
| Line Break | Alphabetic |
| Script | Common |
| Script Extensions | Common |
| Indic Syllabic Category | Other |
| Pattern Syntax | Yes |
| Math | Yes |
| Vertical Orientation | Rotated |
| Grapheme Base | Yes |
| Grapheme Cluster Break | Other |
| Word Break | Other |
| Sentence Break | Other |