Jev glossary
PrimitivesNull option description
Null criteria
Passing null as a Choice option description when the option name needs no extra explanation.
- Category
- Primitives
- Also known as
- Null option description
- Reading time
- 1 min
- Related terms
- 4
- Directory entries
- 2
- Docs
- docs.typesafe.ai
- Added
- 2026-09-24
Definition
Choice criteria values accept null, which tells the model the option name is self-explanatory. It keeps short, unambiguous option sets from filling the request with redundant descriptions.
The rest of the criteria map still carries whatever contrast the options need; null is a signal to spend description budget only where options could be confused.
Tagsprimitivesapi
Related terms
Definitions that connect to this one.
ChoicePick one option from a set you define; returns the selected option, a probability for every option, and confidence.PrimitivesChoice optionOne key in a Choice criteria map, with a description that can be a string, a structured object, or null.PrimitivesCriteriaThe possible answers for a question: a map of options for Choice, an ordered list of levels for Score, or true/false for Noul.PrimitivesEntry typeThe value shapes accepted throughout a request (string, object, array, or null) for state, instructions, and criteria fields.Primitives
From the Jev directory
Directory entries that go deeper on this term.
Pick one option from a set you define. Returns the option, the full probability distribution, and 0-1 confidence, with up to 255 options and parallel questions that barely add latency.
Jev Practices & PatternsDocs#official#primitives#choice
Official
Instructions, option descriptions, score levels, and noul criteria all accept JSON, so you can label question parts, pass schemas and taxonomies, and keep candidate paths alive.
Jev Practices & PatternsDocs#official#primitives#architecture
Official
From the Jev AI model community
Posts from builders shipping with Jev right now.