| value | Datatype | true | https://uor.foundation/schema/Datum | http://www.w3.org/2001/XMLSchema#nonNegativeInteger | The integer value of a datum element. For a Datum in Z/(2^n)Z, this is an integer in [0, 2^n). |
| quantum | Datatype | true | https://uor.foundation/schema/Datum | http://www.w3.org/2001/XMLSchema#positiveInteger | The quantum level n of a datum, where the datum's ring is Z/(2^n)Z. Determines the bit width and modulus of the datum. |
| stratum | Datatype | true | https://uor.foundation/schema/Datum | http://www.w3.org/2001/XMLSchema#nonNegativeInteger | The ring-layer index of a datum, indicating its position in the stratification of Z/(2^n)Z. |
| spectrum | Datatype | true | https://uor.foundation/schema/Datum | http://www.w3.org/2001/XMLSchema#string | The bit-pattern representation of a datum, encoding its position in the hypercube geometry of Z/(2^n)Z. |
| glyph | Object | true | https://uor.foundation/schema/Datum | https://uor.foundation/u/Address | The Braille address associated with this datum, linking the algebraic value to its content-addressable identifier. |
| operator | Object | true | https://uor.foundation/schema/Application | https://uor.foundation/op/Operation | The operation applied in an Application term. |
| argument | Object | false | https://uor.foundation/schema/Application | https://uor.foundation/schema/Term | An argument term in an Application. The ordering of arguments follows rdf:List semantics. |
| ringQuantum | Datatype | true | https://uor.foundation/schema/Ring | http://www.w3.org/2001/XMLSchema#positiveInteger | The bit width n of the ring Z/(2^n)Z. Distinct from schema:quantum on Datum — ringQuantum is the container's bit width; datum quantum is a membership property. |
| modulus | Datatype | true | https://uor.foundation/schema/Ring | http://www.w3.org/2001/XMLSchema#positiveInteger | The modulus 2^n of the ring. Equals 2 raised to the power of ringQuantum. |
| generator | Object | true | https://uor.foundation/schema/Ring | https://uor.foundation/schema/Datum | The generator element π₁ (value = 1) of the ring. Under iterated successor application, π₁ generates all ring elements. |
| negation | Object | true | https://uor.foundation/schema/Ring | https://uor.foundation/op/Involution | The ring reflection involution: neg(x) = (-x) mod 2^n. One of the two generators of the dihedral group D_{2^n}. |
| complement | Object | true | https://uor.foundation/schema/Ring | https://uor.foundation/op/Involution | The hypercube reflection involution: bnot(x) = (2^n - 1) ⊕ x. The second generator of the dihedral group D_{2^n}. |
| denotes | Object | true | https://uor.foundation/schema/Literal | https://uor.foundation/schema/Datum | The datum value that a Literal term denotes. Bridges the Term/Datum disjointness: a Literal refers to a Datum without being one. Evaluation of a Literal produces its denoted Datum. |