# How to Manage Marketplace Mapping in Omnitron?
This tutorial provides step-by-step instructions for managing Marketplace Mapping operations in Omnitron.
## Step 1: Access to Omnitron
* Get access to the **Omnitron** panel.
* Enter your *Username* and *Password*, and then click the **Sign In** button.\
## Step 2: Navigate to Marketplace Mapping Menu
* Follow the **Sales Channels** sidebar and click on the **Sales Channel Settings** menu.
* Click on the **Marketplace Mapping** cardbox to reach the **Marketplace Mapping** menu.
{% hint style="info" %}
**Marketplace Mapping** cardbox appears only when the selected sales channel type is **not** web. In other words, for *Marketplace-type* of sales channels (*Unified* included), this cardboard appears.
{% endhint %}
* On the **Marketplace Mapping** menu,
* Omnitron Attribute Values and Marketplace Attribute Values can be mapped on the **Mapper** page,
* Defined Marketplace Mappings can be controlled product by product on the **Mapping Control** page,
* Marketplace Attributes and Marketplace Attribute Values can be seen on **Marketplace Attributes** and **Marketplace Attribute Values** pages.
## Step 3: View/Filter Marketplace Attributes
* Clicking on the **Marketplace Attributes** cardbox on the **Marketplace Mapping** menu, the **Marketplace Attributes** page can be seen.
* Users can;
* view the *Name* of the Marketplace Attributes,
* filter Marketplace Attributes with respect to *Attribute Name and/ or Attribute Set* values on the **Marketplace Attributes** page.
{% hint style="info" %}
In addition to *Name,* after being filtered with *Attribute Set, Remote ID, Is Required, Is Variant, Is Custom, Is Meta, Attribute Set Name, Updated Date* columns can be seen, too.
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## Step 4: View/Filter Marketplace Attribute Values
* Clicking on the **Marketplace Attribute Values** cardbox on the **Marketplace Mapping** menu, the **Marketplace Attribute Values** page can be seen.
* Users can;
* view the *Primary Key (PK), Attribute, Attribute Value’s Label, Attribute Value, Updated Date* of the Marketplace Attribute Values.
* **Primary Key:** ID of the relevant attribute value, has to be unique.
* **Attribute*****:*** Attribute that the relevant attribute value depends on.
* **Attribute Value’s Label:** Label of the attribute value. For example, there can be an attribute value with a label of “White” and a value of “0001”. In other words the *Name* of the attribute value.
* **Attribute Value:** Attribute Value identifier, has to be unique.
* filter Marketplace Attribute Values with respect to *Attribute Label, Attribute, and/ or Attribute Set* values on the **Marketplace Attribute Values** page.
## Step 5: View/Filter Mapping Rules on Mapper Page
* Clicking on the **Mapper** cardbox on the **Marketplace Mapping** menu, the **Mapper** page can be seen. Users have the option to view, filter, add/edit Mapping Rules for related marketplace.
* *A Mapping Rule can be described as the mapping between an Omnitron Attribute and a Marketplace Attribute.*
* Users can;
* view the *Mapping Rule Name, Creation Date, Update Start Date* of Mapping Rules,
* filter Mapping Rules with respect to *Rule Set Name, Target Attribute, Target Attribute Set, Creation Date and Updated Date*
* *Target = Marketplace, Source = Omnitron*
* add a New Mapping Rule,
* edit an existing Mapping Rule,
* delete one / multiple Mapping Rule(s) on the **Mapper** page.
## Step 6: Add/Edit Mapping Rule
* Clicking on **+ Add New Attribute Mapping Rule** button or clicking on the **Edit** icon on listed Mapping Rules, users can reach the **Add/Edit Attribute Mapping Rule** form.
* Users can;
* name the *Mapping Rule*,
* select the *Target Attribute*,
* select the relevant *Mapping Method,*
* select a default value for mapping in case an error occurs for the mapping rule.
* Target Attributes (Marketplace Attributes) can be filtered by clicking on the *“Show only required target attributes”* checkbox.
There are four different types of *Mapping Methods* available in **Marketplace Mapping Rule Form**:
**Standard:**
In which an Omnitron Attribute & Attribute Values are mapped directly with the Marketplace Attribute & Attribute Values.
{% hint style="info" %}
In *Standard* *Mapping Method*, if both the Source (Omnitron) and Target (Marketplace) Attributes’ data types are “*dropdown”*, an auto-mapping is performed with respect to the attribute values. Auto-mapped attribute values can be distinguished from the corresponding green checkbox icon.
{% endhint %}
This feature can be used only for **Adding a New Mapping Rule**.
**Fixed Value:**
In which a fixed attribute value can be given to selected Marketplace Attribute for all Marketplace Products.
**Merge Fields:**
In which multiple fixed values and / or Omnitron attributes can be concatenated and are mapped with the selected Marketplace Attribute.
**Custom:**
In which a JSON Type of configuration can be given for the mapping of Marketplace Attribute.
* After the relevant *Mapping Method* and mapping configuration are filled out, by clicking on the **Save** button, a Mapping Rule can be created/edited.
* By clicking on the **Clear the Rule** button, relevant Mapping Rule can be cleared. In other words, the mapping rule still exists, but without any configuration.
## Step 7: Delete Mapping Rule
* On the **Mapper** page, by selecting the listed Mapping Rules, the “Delete Selected Mapping Rule(s)” option and clicking on the **Apply** button, users can delete existing Mapping Rule(s).
## Step 8: Control Marketplace Mapping
* Clicking on the **Mapping Control** cardbox on the **Marketplace Mapping** menu, the **Mapping Control** page can be seen.
* Users can;
* view the products that are in the Marketplace Catalog with respect to their all attributes, SKU, Base Code, Category, etc information,
* filter the Marketplace-Catalog products with respect to all-product-attributes,
* preview & Download the Marketplace Attributes and Marketplace Attribute Values for filtered products on the **Mapping Control** page.
* After filtering the Marketplace-Catalog Products, clicking on the **Show Mapping Result** button opens the Mapping Control pop-up, in which the Marketplace Attributes and Marketplace Attributes can be seen and downloaded by the user.
{% hint style="info" %}
This menu is only available for sales-channel-type of Marketplaces.
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