My understanding is that it's an instance of the activity type, but could be a series to include multiple hiking trips.

"Aaron E. Silvers" <notifications@github.com> wrote:

>               <td>Metadata, <a href="#actdef">See below</a></td>
>       </tr>
>  </table>
>  <a name="acturi"/>
> -###### Activity ID
> -An activity ID must always refer to a single unique activity. There may be

From [Ingo](http://iwmuser.uni-koblenz.de/~dahn/TLA/Experience/V1p0/xAPI-Spec_ID.pdf):

> Does this mean an abstract activity or to an activity instance? I.e.: Are hiking, hiking on Monday and hiking on Tuesday considered as 3 different activities which must have 3 different ids?

---
Reply to this email directly or view it on GitHub:
https://github.com/adlnet/xAPI-Spec/pull/202/files#r3904477