# reference\_field
<a name="reference-fields-entity"></a>

**Primary key (PK)**

The table below lists the colum names that are uniquely identified in the data entity.


| Name | Column | 
| --- | --- | 
| reference\_field | object\_name, object\_field, object\_field\_value, object\_field\_desc | 

The table below lists the column names supported by the data entity:


| Column | Data type | Required | Description | 
| --- | --- | --- | --- | 
| company\_id2 | string | No | Company ID. | 
| object\_name | string | Yes1 | For example, sites, or transportation lanes. | 
| object\_field | string | Yes1 | For example, site\_type, or trans\_mode. | 
| object\_field\_value | string | Yes1 | For example, site\_type:01, or trans\_mode:01. | 
| object\_field\_desc | string | Yes1 | For example, site\_type:01:DC, or trans\_mode:01:Surface. | 

1You must enter a value. When you ingest data from SAP or EDI, the default value for *string* is SCN\_RESERVED\_NO\_VALUE\_PROVIDED.

2Foreign key

**Foreign key (FK)**

The table below lists the column names with the associated data entity and category:


| Column | Category | FK/Data entity | FK/Column | 
| --- | --- | --- | --- | 
| company\_id | Organization | company | id |