> For the complete documentation index, see [llms.txt](https://resources.unizin.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://resources.unizin.org/products/data-and-analytics/unizin-data-platform/unizin-common-data-model/social-erd.md).

# Social (ERD)

The UCDM includes a number of entities to represent Social activities in a learning environment. These do not include social media activities. Rather, the entities refer to the pedagogical and learner activities driven by social communication, such as discussion forums.

## Entities <a href="#social-erd-entities" id="social-erd-entities"></a>

The Social entities in the Unizin Common Data Model are as follows:

<table data-full-width="true"><thead><tr><th width="225.33333333333337">Entity</th><th>Definition</th><th>Data dictionary documentation</th></tr></thead><tbody><tr><td>Discussion</td><td>An interchange of concepts or ideas between two or more actors in a structured manner with a defined topic.</td><td><a href="https://docs.udp.unizin.org/ucdm/data-dictionary-2.0.html#discussion">https://docs.udp.unizin.org/ucdm/data-dictionary-2.0.html#discussion</a></td></tr><tr><td>Discussion entry</td><td>A response to a given Discussion, given by a single Person.</td><td><a href="https://docs.udp.unizin.org/ucdm/data-dictionary-2.0.html#discussion_entry">https://docs.udp.unizin.org/ucdm/data-dictionary-2.0.html#discussion_entry</a></td></tr><tr><td>Conversation</td><td>An interchange of concepts or ideas between two or more actors in an unstructured manner without a defined topic.</td><td><a href="https://docs.udp.unizin.org/ucdm/data-dictionary-2.0.html#conversation">https://docs.udp.unizin.org/ucdm/data-dictionary-2.0.html#conversation</a></td></tr><tr><td>Conversation message</td><td>A discrete piece of information sent as part of a Conversation.</td><td><a href="https://docs.udp.unizin.org/ucdm/data-dictionary-2.0.html#conversation_message">https://docs.udp.unizin.org/ucdm/data-dictionary-2.0.html#conversation_message</a></td></tr><tr><td>Participant session</td><td>A session in which Persons participate, such as a conference.</td><td><a href="https://docs.udp.unizin.org/ucdm/data-dictionary-2.0.html#participant_session">https://docs.udp.unizin.org/ucdm/data-dictionary-2.0.html#participant_session</a></td></tr><tr><td>Participant session role</td><td>The role in which a Person acts in a given Participant session.</td><td><a href="https://docs.udp.unizin.org/ucdm/data-dictionary-2.0.html#participant_session_role">https://docs.udp.unizin.org/ucdm/data-dictionary-2.0.html#participant_session_role</a></td></tr></tbody></table>

## Entity Relationship Diagram (ERD) <a href="#social-erd-entityrelationshipdiagram-erd" id="social-erd-entityrelationshipdiagram-erd"></a>

The following Entity Relationship Diagram (ERD) represents the UCDM's Social entities and their relationships.

<figure><img src="/files/tmVOwptYg9XhFP3yzVbv" alt=""><figcaption></figcaption></figure>

{% hint style="info" %}
**Academic structures ERD only**

This diagram only represents entities in the Social section of the Unizin Common Data Model. Any relationships with entities outside of the Social section of the UCDM are not shown here.
{% endhint %}


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