# Unnecessary ancestor for AUTHORED\_ARCHETYPE

**URL:** https://discourse.openehr.org/t/unnecessary-ancestor-for-authored-archetype/2073
**Category:** Specifications
**Created:** [14 November 2021 13:02 UTC](https://discourse.openehr.org/t/unnecessary-ancestor-for-authored-archetype/2073 "2021-11-14T13:02:26Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![borut.jures](https://discourse.openehr.org/user_avatar/discourse.openehr.org/borut.jures/32/1391_2.png) [@borut.jures](https://discourse.openehr.org/u/borut.jures)
#### Post date: [14 November 2021 13:02 UTC](https://discourse.openehr.org/t/unnecessary-ancestor-for-authored-archetype/2073/1 "2021-11-14T13:02:26Z")

</div>

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

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

```

However ARCHETYPE already extends AUTHORED\_RESOURCE:

```auto
    ["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 🤔

---

<div class="post-metadata">

### Author: ![thomas.beale](https://discourse.openehr.org/user_avatar/discourse.openehr.org/thomas.beale/32/35_2.png) [@thomas.beale](https://discourse.openehr.org/u/thomas.beale)
#### Post date: [14 November 2021 20:25 UTC](https://discourse.openehr.org/t/unnecessary-ancestor-for-authored-archetype/2073/2 "2021-11-14T20:25:54Z")

</div>

> [@borut.jures](#):
>
> However ARCHETYPE already extends AUTHORED\_RESOURCE

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).