---
title: How to validate a label barcode?
description: This article guides you through matching a multifield barcode that contains different parts of information with details of the product. In this example, we match the first number of a barcode to the job information.
---
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# How to validate a label barcode?
## This article guides you through matching a multifield barcode that contains different parts of information with details of the product. In this example, we match the first number of a barcode to the job information.
Take this example: there are two barcodes, `12345` and `23456`, and the first digit of each matches a Site ID.
- If the first digit is 1, the Site ID is ABC.
- If the first digit is 2, the Site ID is XYZ.
#### **Step 1 — Create the fields**
Create two fields in your form: **Barcode** and **ID**.
- The barcode digit is scanned into **Barcode** by the operator.
- **ID** is pulled automatically from the product list.
#### **Step 2 — Pull the ID from the product list**
In the **ID** field, use the variable icon to automatically pull data from the product list.
#### **Step 3 — Add the validation rules**
In the **ID** field's **Field Validation Rules** tab, create the following:
```
(data["Barcode"]=~"^1")&&(data["ID"]=="ABC")
```
The `^1` anchors the match to the first digit, which must be 1.
```
(data["Barcode"]=~"^2")&&(data["ID"]=="XYZ")
```
The `^2` anchors the match to the first digit, which must be 2.
```
1==1
```
Use this catch-all to invalidate everything outside the valid combinations above.
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