# timely (punctual)

arriving within a window during the interval it is open.

- Computed level: L18 (depth in the emergence graph, not abstraction)
- Status: review  ·  Domain: temporal  ·  Arena: general

## Emergence
**Emerges from:** [window](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-window.range), [parameter](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-parameter.condition), [drift](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-drift.aimless), [wall](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-wall.range-end), [open](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-open.spatial), [time](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-time.dimension)

**Through:** When a parameter whose wall ends the window is approached by drift, arriving before the wall allows the thing to persist within the window.

**Novel properties:**
- arrival within open interval
- persistence enabled by timing
- temporal eligibility

## Examples
- The Tokyo Metro Ginza Line runs every 120 seconds on weekday mornings, rarely varying by more than 15 seconds. *(transportation)*
- The Mars rover Opportunity transmitted data within a 3-minute downlink window each Martian day as scheduled for 5,250 sols. *(space exploration)*
- The New York Stock Exchange opens trading at exactly 9:30:00 AM Eastern Time, down to the millisecond, every business day. *(economics)*

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*Canonical: https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-timely.punctual*  
*Structured data: https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-timely.punctual.json*  
*Every definition provably resolves to space, time, energy and pattern.*