# Unnecessary ancestor for AUTHORED_ARCHETYPE

**Category:** [Specifications](https://discourse.openehr.org/c/specifications/6)
**Created:** 2021-11-14 13:02 UTC
**Views:** 311
**Replies:** 1
**URL:** https://discourse.openehr.org/t/unnecessary-ancestor-for-authored-archetype/2073

---

## Post #1 by @borut.jures

AUTHORED_ARCHETYPE defined in [components/AM/openEHR_am_230.bmm](https://github.com/openEHR/specifications-ITS-BMM/blob/fef7bf1580fc36243b1aa21206811be624dbc88a/components/AM/openEHR_am_230.bmm#L153) has two ancestors:
- ARCHETYPE
- AUTHORED_RESOURCE

```
    ["AUTHORED_ARCHETYPE"] = (P_BMM_CLASS) <
        name = <"AUTHORED_ARCHETYPE">
        ancestors = <"ARCHETYPE", "AUTHORED_RESOURCE">
```

However ARCHETYPE already extends AUTHORED_RESOURCE:

```
    ["ARCHETYPE"] = (P_BMM_CLASS) <
        name = <"ARCHETYPE">
        ancestors = <"AUTHORED_RESOURCE">
```

Can the unnecessary AUTHORED_RESOURCE ancestor be removed from AUTHORED_ARCHETYPE?

Or should the AUTHORED_RESOURCE ancestor be removed from the ARCHETYPE :thinking:

---

## Post #2 by @thomas.beale

[quote="borut.jures, post:1, topic:2073"]
However ARCHETYPE already extends AUTHORED_RESOURCE
[/quote]

That is an error, now fixed. [See the UML](https://specifications.openehr.org/releases/UML/latest/index.html#Diagrams___18_1_83e026d_1422971258847_792963_30335).

---


**Canonical:** https://discourse.openehr.org/t/unnecessary-ancestor-for-authored-archetype/2073
**Original content:** https://discourse.openehr.org/t/unnecessary-ancestor-for-authored-archetype/2073