Different systems deal with an empty variable differently. Most users leave this in its default state. If you do not select this option, there is no default value. Provide any requested information about the chosen type in the fields provided. For information about the types available with the Core tag extension, refer to Types of data elements. The available data element types are determined by the extension. Data elements let you create a data dictionary (or data map) of commonly used items on a page, regardless of where they originate (query strings, URLs, or cookie values) for any object that is contained on your site.ДЇrom a Property page, open the Data Elements tab, then select Create New Data Element. _satellite.getVar('data element name') Create a data elementДata elements are the building blocks for rules. You can use data elements in custom scripts by using the _satellite object syntax: You can use data elements in the rule editing interface by using the search box to find the name of your data element. Use the data element in a rule or a custom script.Create a data element, if you havenвЂ™t done so already.If a data element is not referenced in a rule, it is not loaded on any page unless specifically called in custom scriptДata elements are populated with data when they are used in rules or when manually called in a script. You simply change the reference once in the data element and all rules that reference that data element automatically update. If for some reason in the future you decide to change the way you reference page name (for example, you have been referencing document.title but you now want to reference a particular data layer), you donвЂ™t need to edit many different rules to change that reference. You can then use this data element in any rule that needs to reference the page name. Tags in Adobe Experience Platform allow you to create a data element as a single point of reference for that particular point of data. Using page name as an example, suppose you use a particular page-name schema by referencing a data layer, document.title element, or a title tag within the website. The concept of reusable data elements is very powerful and you should use them as best practice.ДЇor example, if there is a particular way that you reference page names or product IDs or grab information from query string parameters from an affiliate marketing link or from AdWords, and so forth, you can create a data dictionary (data elements) by getting information from its source and then using this data in various tag rules. You define data rules once and then use them in multiple places. Use data elements as widely as possible throughout rule creation to consolidate the definition of dynamic data and to improve the efficiency of your tagging process. Changes do not take effect until they are published.

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