# Data validation conformance tests for URI data types

**Category:** [Specifications](https://discourse.openehr.org/c/specifications/6)
**Created:** 2022-01-05 03:26 UTC
**Views:** 340
**Replies:** 0
**URL:** https://discourse.openehr.org/t/data-validation-conformance-tests-for-uri-data-types/2242

---

## Post #1 by @pablo

The DV_URI and the DV_EHR_URI have a `value` attribute that should have a specific format, in both bases the value should be compliant with the RFC3986 URI definition, and for DV_EHR_URI the URI `scheme` should be equals to `ehr`.

Since DV_URI.value is String, in archetypes and templates it is possible to define a constraint using the C_STRING pattern or list constraints.

When using the `pattern`, we need to be sure the constraint is compatible with the URI format.

I couldn't find this detail noted in the specs.


A related point, in the DV_URI there is no invariant / method to validate the `value` is compliant with RFC3986. I believe we might need something to check the value is correct. Any thoughts?

---


**Canonical:** https://discourse.openehr.org/t/data-validation-conformance-tests-for-uri-data-types/2242
**Original content:** https://discourse.openehr.org/t/data-validation-conformance-tests-for-uri-data-types/2242