Activity › Forums › Salesforce® Discussions › What is __ MDT in Salesforce? Salesforce® Discussions What is __ MDT in Salesforce? Posted by Marziya on August 5, 2020 at 3:42 PM What is __ MDT in Salesforce? Ayush replied 5 years, 9 months ago 3 Members · 2 Replies 2 Replies Kirandeep Member August 5, 2020 at 4:09 PM Custom Metadata Type __mdt. Represents a custom metadata record. This object is available in API version 34.0 and later. … For example, PicklistUsage__mdt represents a custom metadata record based on the PicklistUsage custom metadata type. [adinserter block='9'] Ayush Member August 6, 2020 at 10:49 AM __mdt means Custom Metadata Type. Log In to reply. Public All Members My Connections Only Me PublicAll MembersMy ConnectionsOnly Me Public All Members My Connections Only Me