# Invalidation Tag

> A formal definition of the tag for a file that decides when a cached value no longer holds and removes it, filed in an invalidation folder.

Record: `lexicon:invalidation-tag`
Kind: artifact
Layer: [Structural Core](https://banes-lab.com/records/layer/structural-core.md)
Canonical: https://banes-lab.com/ontology/lexicon#lexicon-invalidation-tag

Listed in [Lexicon terms](https://banes-lab.com/api/records/lexicon.md), after [Cache-Key Tag](https://banes-lab.com/records/lexicon/cache-key-tag.md) and before [Eviction Tag](https://banes-lab.com/records/lexicon/eviction-tag.md).

## Category

- [Infrastructure Concerns](https://banes-lab.com/records/lexicon-category/infrastructure-concerns.md)