# 3.8.4. ຄຳນິຍາມຂອງປະເພດກຣາຟ acyclic ທີ່ມີໂຕຊີ້ບອກ (directed acyclic graph)

{% hint style="warning" %}
ຄວາມສຳພັນກັນຂອງປະເພດກຣາຟ acyclic ທີ່ມີໂຕຊີ້ບອກທັງໝົດລະຫວ່າງ Geo-Objects (ຂໍ້ມູນໃນຕອນນັ້ນ) ຈະຕ້ອງດຳເນີນການຜ່ານ [GeoPrism Registry API](https://georegistry-api-docs.geoprism.net/#tag/ETL/operation/importEdgeJson).
{% endhint %}

## **3.8.4.1. ຄຳນິຍາມຂອງ XSD**

```
<xs:complexType name="dag">
    <xs:attribute name="code" type="xs:string" use="required" />
    <xs:attribute name="label" type="xs:string" use="required" />
    <xs:attribute name="description" type="xs:string" use="optional" />
  </xs:complexType>
```

ຕົວຢ່າງ:

```
<dag
    code="FLOWS_INTO"
    label="Flows Into (MOH)"
    description=" This DAG links bodies of water which flow into other bodies of water"/>  
```


---

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