# 3.8.5. Undirect graph type definitions
{% hint style="warning" %}
All undirected graph type relationships between Geo-Objects (instance data) must be done through the [GeoPrism Registry API](https://georegistry-api-docs.geoprism.net/#tag/ETL/operation/importEdgeJson).
{% endhint %}
## 3.8.5.1. XSD definition
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Example:
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Some example files can be accessed here:
{% file src="" %}
{% file src="" %}