Jev glossary
Evaluation & TrainingDate comparison
Dates as text
Jev reads dates as strings, not ordered quantities; extract components with Choice and do the ordering and math in code.
- Category
- Evaluation & Training
- Also known as
- Date comparison
- Reading time
- 1 min
- Related terms
- 4
- Directory entries
- 2
- Docs
- docs.typesafe.ai
- Added
- 2026-09-24
Definition
Asking which of two dates comes first, how far apart they are, or whether one falls in a window is unreliable, and mixed formats, relative references, and domain boundaries such as quarters make it worse.
The recommended split is extraction as a judgment and arithmetic as code. Every date part is a small closed set (twelve months, thirty-one days, a bounded year range), which turns extraction into a Choice over enumerated options with an explicit not-stated option.
Tagslimitationsdesign
Related terms
Definitions that connect to this one.
JaggednessThe documented set of jev-1.13 failure modes (literal reading, counting, dates, indirection, context rot), each with a guardrail.Evaluation & TrainingChoicePick one option from a set you define; returns the selected option, a probability for every option, and confidence.PrimitivesUnreliable countingJev does not count reliably (characters, occurrences, or list items), and error grows with the size of the thing counted.Evaluation & TrainingPre-parsed value extractionRegex finds candidate spans, then Jev picks the requested one so code copies a verbatim value that cannot be invented.Patterns
From the Jev directory
Directory entries that go deeper on this term.
A maintained list of jev-1.13's known failure modes, literal reading, unreliable counting, dates as text, indirection, context rot, and contradictory criteria, each with a guardrail.
Jev Practices & PatternsDocs#official#docs#evaluation
Official
Extract dates by asking seven Choice questions about a date's shape and parts, then resolving them in code: five of six examples auto-accepted and missing dates flagged at 0.46 confidence.
Jev CookbooksDocs#official#cookbook#extraction
Official
From the Jev AI model community
Posts from builders shipping with Jev right now.