Specification: Rational Numbers (OSCAR v1.6-v1.8)

Profiles: OSCAR v1.6, OSCAR v1.7, OSCAR v1.8 Other versions: Rational Numbers (OSCAR v1.0-v1.5)

From OSCAR v1.6 onward, rational numbers are represented as typed values whose payload is a textual fraction such as "42//23". The field context is part of the type.

Encoding rules

• Use a typed encoding such as QQFieldElem rather than a bare JSON number.
• Store the rational value under data using the profile's textual normal form.
• Record the ambient field in _type.params when required by the profile.

Canonical Example Payload

The following payload is taken directly from the current rosetta-stone corpus.

{
  "_ns": {"Oscar": ["https://github.com/oscar-system/Oscar.jl", "1.7.0"]},
  "_type": {"name": "QQFieldElem", "params": {"_type": "QQField"}},
  "data": "42//23"
}

Documented Profiles in This Corpus

This table records the profile/version pairs currently represented by the rosetta-stone examples for this data type. Add new rows as new systems or encoding revisions are documented.

Rosetta Stone Examples

• Rational number