# Old records, new meanings

Prompt · Data integrity and analytics · D03

Finds old records that read differently once today's rules are applied to them.

## Prompt

```text
Find historical records whose meanings change when current classifications or schemas are applied retroactively. Identify where time-aware interpretation is necessary.
```

**What it returns:** Each classification with when it changed, which records predate it, and how the app reads them now.

**Skip it when:** Data with no history or no categories.

**Tools:** Read-only database access, history of database changes.

**Changes:** Changes nothing

**Sessions:** One session

## Related

- [Dates, times and time zones](https://www.atlasscope.dev/prompts/dates-times-and-time-zones): Finds the date bugs that show up twice a year, at midnight, or in another time zone.
- [Where did this number come from?](https://www.atlasscope.dev/prompts/where-did-this-number-come-from): Checks that every number on screen can be traced back to a source document.
- [Reproduce what the database believed in the past](https://www.atlasscope.dev/prompts/reproduce-what-the-database-believed-in-the-past): Past reports, backfills, restatements or changed classification rules matter.

Source: https://www.atlasscope.dev/prompts/old-records-new-meanings