---
metadata:
- name: generator
content: Diplodoc Platform v5.50.6
alternate:
- https://www.yandex.com/support/webmaster/en/indexing-options/xml-validator.md
- https://www.yandex.com/support/webmaster/tr/indexing-options/xml-validator.md
---
> **Documentation Index:** Fetch the complete configuration index at https://www.yandex.com/support/webmaster/en/llms.txt
# XML validator
[The XML validator](https://webmaster.yandex.com/tools/xml-validator/) checks your XML file against its XSD schema, verifying syntax, structure, content model, and data types. This XML file transmits data for your site's display in Yandex Search.
The validator doesn't check the set of elements in the feed. For example, if an XML file is missing an element that is required for the partner program, the validator won't detect that. As a result, the feed will not work in the partner program.
Manually check your XML file elements to ensure they meet the technical requirements of the program.
## How to check the file
**1. Select a validation schema**
There are several types of validation schemes available in the tool. Select the one you need.
{% cut "Doctors" %}
Check your YML feed before you submit data about the doctors and medical services listed on your site to Yandex Search.
{% endcut %}
{% cut "Realty" %}
Validate the format of the export file for Yandex Realty. It contains basic information about the ads.
{% endcut %}
{% cut "Videos" %}
Validate the format of the export file for [Yandex Video](http://video.yandex.com/). You can submit data about the videos placed on your site.
{% endcut %}
{% cut "Market" %}
Validate the format of the YML export file for [online store search](https://yandex.com/support/site/create-catalogue/create.html).
{% endcut %}
{% cut "Business" %}
Validate the format of the export file for the **Yandex Business** partner program. You can submit data about your company's branches for bulk addition to Yandex Maps and to Yandex Search snippets. See the [technical requirements](https://yandex.com/support/business-priority/branches/basic.html#basic__xml).
{% endcut %}
The default option is **Doctors**. If you have a different schema that you didn't specify, an error will appear:
```
Row: 3 Position: 38
More details
cvc-elt.1.a: Cannot find the declaration of element
'yml_catalog'.
```
You can also upload your own schema. To do this, select **Other**.
**2. Choose the source of XML data for validation.**
- **File**
You can upload a custom XSD file and use it to validate your XML documents.
Click **Choose file** and upload the file.
- **Link**
Enter the URL of your custom XSD schema.
- **Code**
Copy the contents of the XSD schema into the text box.
Click **Check**.