# Function Creep
**Domain:** Deep Time / Data Protection / Institutional Change
**Doc Type:** Canonical Wiki Entry
**Maturity:** Developed
**Evidence / Concept Status:** Established privacy-regulation concept
## Definition
**Function Creep** is expansion of a system, dataset, identifier, or control mechanism beyond its stated original purpose.
## Why It Matters for Deep Time Continuity
It is a direct warning that today's narrow continuity-adjacent systems can become tomorrow's identity or custody infrastructure.
## Existing Architecture / Evidence
The UK ICO's purpose-limitation guidance explicitly says specifying purposes helps avoid function creep.
## Deep-Time Continuity Analysis
Deep-time analysis applies the same vigilance to removal, identity, biometric, model, and registry systems.
## Evidentiary Boundary
Function creep can be benign, harmful, or contested; motive must be established separately.
## Related Ontology
[[wiki/Institutional Conversion|Institutional Conversion]] · [[wiki/Purpose Limitation|Purpose Limitation]] · [[wiki/Deep-Time Institutional Conversion|Deep-Time Institutional Conversion]]
## Sources / Primary Anchors
- https://ico.org.uk/for-organisations/uk-gdpr-guidance-and-resources/data-protection-principles/a-guide-to-the-data-protection-principles/purpose-limitation
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## Canonical Branch
[[wiki/Deep Time Continuity|Deep Time Continuity]]
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